1220220110021 has 8 divisors (see below), whose sum is σ = 1352971329888. Its totient is φ = 1091105910000.

The previous prime is 1220220110009. The next prime is 1220220110033. The reversal of 1220220110021 is 1200110220221.

It is an interprime number because it is at equal distance from previous prime (1220220110009) and next prime (1220220110033).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1220220110021 - 2¹⁸ = 1220219847877 is a prime.

It is a super-2 number, since 2×1220220110021² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1220220109978 and 1220220110005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220220110071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 909254255 + ... + 909255596.

It is an arithmetic number, because the mean of its divisors is an integer number (169121416236).

Almost surely, 2^{1220220110021} is an apocalyptic number.

1220220110021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1220220110021 is a deficient number, since it is larger than the sum of its proper divisors (132751219867).

1220220110021 is a wasteful number, since it uses less digits than its factorization.

1220220110021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1818509923.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 1220220110021 its reverse (1200110220221), we get a palindrome (2420330330242).

The spelling of 1220220110021 in words is "one trillion, two hundred twenty billion, two hundred twenty million, one hundred ten thousand, twenty-one".