22221212010 has 32 divisors (see below), whose sum is σ = 55169907840. Its totient is φ = 5721323328.

The previous prime is 22221211979. The next prime is 22221212017. The reversal of 22221212010 is 1021212222.

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (22221212017) 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, 12769942 + ... + 12771681.

It is an arithmetic number, because the mean of its divisors is an integer number (1724059620).

Almost surely, 2^22221212010 is an apocalyptic number.

22221212010 is an abundant number, since it is smaller than the sum of its proper divisors (32948695830).

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

22221212010 is a wasteful number, since it uses less digits than its factorization.

22221212010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25541662.

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

Adding to 22221212010 its reverse (1021212222), we get a palindrome (23242424232).

The spelling of 22221212010 in words is "twenty-two billion, two hundred twenty-one million, two hundred twelve thousand, ten".