1220211022021 has 8 divisors (see below), whose sum is σ = 1223251271424. Its totient is φ = 1217173030080.

The previous prime is 1220211021971. The next prime is 1220211022039. The reversal of 1220211022021 is 1202201120221.

It is a happy number.

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 1220211022021 - 2¹⁵ = 1220210989253 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1220211021986 and 1220211022004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220211023021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 520621 + ... + 1646653.

It is an arithmetic number, because the mean of its divisors is an integer number (152906408928).

Almost surely, 2^{1220211022021} is an apocalyptic number.

It is an amenable number.

1220211022021 is a deficient number, since it is larger than the sum of its proper divisors (3040249403).

1220211022021 is a wasteful number, since it uses less digits than its factorization.

1220211022021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1128731.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 1220211022021 its reverse (1202201120221), we get a palindrome (2422412142242).

The spelling of 1220211022021 in words is "one trillion, two hundred twenty billion, two hundred eleven million, twenty-two thousand, twenty-one".