22021002100121 has 16 divisors (see below), whose sum is σ = 23644015084800. Its totient is φ = 20435693127168.

The previous prime is 22021002100117. The next prime is 22021002100157. The reversal of 22021002100121 is 12100120012022.

It is a cyclic number.

It is not a de Polignac number, because 22021002100121 - 2² = 22021002100117 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22021002100096 and 22021002100105.

It is not an unprimeable number, because it can be changed into a prime (22021002100171) 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, 19727765 + ... + 20814098.

It is an arithmetic number, because the mean of its divisors is an integer number (1477750942800).

Almost surely, 2^{22021002100121} is an apocalyptic number.

It is an amenable number.

22021002100121 is a deficient number, since it is larger than the sum of its proper divisors (1623012984679).

22021002100121 is a wasteful number, since it uses less digits than its factorization.

22021002100121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40542328.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 22021002100121 its reverse (12100120012022), we get a palindrome (34121122112143).

The spelling of 22021002100121 in words is "twenty-two trillion, twenty-one billion, two million, one hundred thousand, one hundred twenty-one".