22100121202221 has 24 divisors (see below), whose sum is σ = 32940544819104. Its totient is φ = 14267274305760.

The previous prime is 22100121202213. The next prime is 22100121202223. The reversal of 22100121202221 is 12220212100122.

It is a happy number.

22100121202221 is a `hidden beast` number, since 22 + 100 + 121 + 202 + 221 = 666.

It is not a de Polignac number, because 22100121202221 - 2³ = 22100121202213 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22100121202194 and 22100121202203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22100121202223) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 157196871 + ... + 157337396.

It is an arithmetic number, because the mean of its divisors is an integer number (1372522700796).

Almost surely, 2^{22100121202221} is an apocalyptic number.

It is an amenable number.

22100121202221 is a deficient number, since it is larger than the sum of its proper divisors (10840423616883).

22100121202221 is a wasteful number, since it uses less digits than its factorization.

22100121202221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 314534521 (or 314534518 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 22100121202221 its reverse (12220212100122), we get a palindrome (34320333302343).

The spelling of 22100121202221 in words is "twenty-two trillion, one hundred billion, one hundred twenty-one million, two hundred two thousand, two hundred twenty-one".