22121222010 has 32 divisors (see below), whose sum is σ = 53279888832. Its totient is φ = 5877997440.

The previous prime is 22121221981. The next prime is 22121222027. The reversal of 22121222010 is 1022212122.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1303624 + ... + 1320483.

It is an arithmetic number, because the mean of its divisors is an integer number (1664996526).

Almost surely, 2^22121222010 is an apocalyptic number.

22121222010 is an abundant number, since it is smaller than the sum of its proper divisors (31158666822).

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

22121222010 is a wasteful number, since it uses less digits than its factorization.

22121222010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2624398.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 22121222010 its reverse (1022212122), we get a palindrome (23143434132).

The spelling of 22121222010 in words is "twenty-two billion, one hundred twenty-one million, two hundred twenty-two thousand, ten".