1220210111021 has 8 divisors (see below), whose sum is σ = 1344061977024. Its totient is φ = 1098512190720.

The previous prime is 1220210111017. The next prime is 1220210111033. The reversal of 1220210111021 is 1201110120221.

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 1220210111021 - 2² = 1220210111017 is a prime.

It is a super-2 number, since 2×1220210111021² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1220210110987 and 1220210111005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220210191021) 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, 538485236 + ... + 538487501.

It is an arithmetic number, because the mean of its divisors is an integer number (168007747128).

Almost surely, 2^{1220210111021} is an apocalyptic number.

1220210111021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1220210111021 is a deficient number, since it is larger than the sum of its proper divisors (123851866003).

1220210111021 is a wasteful number, since it uses less digits than its factorization.

1220210111021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1076972851.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 1220210111021 its reverse (1201110120221), we get a palindrome (2421320231242).

The spelling of 1220210111021 in words is "one trillion, two hundred twenty billion, two hundred ten million, one hundred eleven thousand, twenty-one".