1021112022221 has 16 divisors (see below), whose sum is σ = 1068967134720. Its totient is φ = 974253181440.

The previous prime is 1021112022143. The next prime is 1021112022277. The reversal of 1021112022221 is 1222202111201.

It is not a de Polignac number, because 1021112022221 - 2²² = 1021107827917 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1021112022221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021112025221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 424085 + ... + 1490661.

It is an arithmetic number, because the mean of its divisors is an integer number (66810445920).

Almost surely, 2^{1021112022221} is an apocalyptic number.

It is an amenable number.

1021112022221 is a deficient number, since it is larger than the sum of its proper divisors (47855112499).

1021112022221 is a wasteful number, since it uses less digits than its factorization.

1021112022221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1067044.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 1021112022221 its reverse (1222202111201), we get a palindrome (2243314133422).

The spelling of 1021112022221 in words is "one trillion, twenty-one billion, one hundred twelve million, twenty-two thousand, two hundred twenty-one".