22155021210 has 96 divisors (see below), whose sum is σ = 63169424640. Its totient is φ = 4956244608.

The previous prime is 22155021199. The next prime is 22155021223. The reversal of 22155021210 is 1212055122.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 91245 + ... + 229424.

It is an arithmetic number, because the mean of its divisors is an integer number (658014840).

Almost surely, 2^22155021210 is an apocalyptic number.

22155021210 is an abundant number, since it is smaller than the sum of its proper divisors (41014403430).

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

22155021210 is a wasteful number, since it uses less digits than its factorization.

22155021210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 320740 (or 320733 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 21.

Adding to 22155021210 its reverse (1212055122), we get a palindrome (23367076332).

The spelling of 22155021210 in words is "twenty-two billion, one hundred fifty-five million, twenty-one thousand, two hundred ten".