22221121311021 has 16 divisors (see below), whose sum is σ = 31362609072960. Its totient is φ = 13970616764160.

The previous prime is 22221121310957. The next prime is 22221121311089. The reversal of 22221121311021 is 12011312112222.

It is not a de Polignac number, because 22221121311021 - 2⁶ = 22221121310957 is a prime.

It is a super-2 number, since 2×22221121311021² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22221121312021) 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 15 ways as a sum of consecutive naturals, for example, 2969940300 + ... + 2969947781.

It is an arithmetic number, because the mean of its divisors is an integer number (1960163067060).

Almost surely, 2^{22221121311021} is an apocalyptic number.

It is an amenable number.

22221121311021 is a deficient number, since it is larger than the sum of its proper divisors (9141487761939).

22221121311021 is a wasteful number, since it uses less digits than its factorization.

22221121311021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5939888156.

The product of its (nonzero) digits is 192, while the sum is 21.

Adding to 22221121311021 its reverse (12011312112222), we get a palindrome (34232433423243).

The spelling of 22221121311021 in words is "twenty-two trillion, two hundred twenty-one billion, one hundred twenty-one million, three hundred eleven thousand, twenty-one".