1220022111021 has 12 divisors (see below), whose sum is σ = 1892279192832. Its totient is φ = 697155491928.

The previous prime is 1220022110987. The next prime is 1220022111031. The reversal of 1220022111021 is 1201112200221.

It is not a de Polignac number, because 1220022111021 - 2²² = 1220017916717 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220022111031) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4149734925 + ... + 4149735218.

It is an arithmetic number, because the mean of its divisors is an integer number (157689932736).

Almost surely, 2^{1220022111021} is an apocalyptic number.

It is an amenable number.

1220022111021 is a deficient number, since it is larger than the sum of its proper divisors (672257081811).

1220022111021 is an equidigital number, since it uses as much as digits as its factorization.

1220022111021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8299470160 (or 8299470153 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 1220022111021 its reverse (1201112200221), we get a palindrome (2421134311242).

The spelling of 1220022111021 in words is "one trillion, two hundred twenty billion, twenty-two million, one hundred eleven thousand, twenty-one".