22121002212210 has 128 divisors (see below), whose sum is σ = 64355353804800. Its totient is φ = 5362388256960.

The previous prime is 22121002212203. The next prime is 22121002212223. The reversal of 22121002212210 is 1221220012122.

It is a happy number.

22121002212210 is a `hidden beast` number, since 2 + 21 + 210 + 0 + 221 + 2 + 210 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 60068821 + ... + 60435959.

It is an arithmetic number, because the mean of its divisors is an integer number (502776201600).

Almost surely, 2^{22121002212210} is an apocalyptic number.

22121002212210 is an abundant number, since it is smaller than the sum of its proper divisors (42234351592590).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22121002212210 is a wasteful number, since it uses less digits than its factorization.

22121002212210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 387453 (or 387447 counting only the distinct ones).

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

Adding to 22121002212210 its reverse (1221220012122), we get a palindrome (23342222224332).

The spelling of 22121002212210 in words is "twenty-two trillion, one hundred twenty-one billion, two million, two hundred twelve thousand, two hundred ten".