22101210252 has 72 divisors (see below), whose sum is σ = 62242532352. Its totient is φ = 6554834400.

The previous prime is 22101210233. The next prime is 22101210283. The reversal of 22101210252 is 25201210122.

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 23 ways as a sum of consecutive naturals, for example, 575124 + ... + 612347.

It is an arithmetic number, because the mean of its divisors is an integer number (864479616).

Almost surely, 2^22101210252 is an apocalyptic number.

22101210252 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

22101210252 is an abundant number, since it is smaller than the sum of its proper divisors (40141322100).

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

22101210252 is a wasteful number, since it uses less digits than its factorization.

22101210252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1187539 (or 1187534 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

Adding to 22101210252 its reverse (25201210122), we get a palindrome (47302420374).

The spelling of 22101210252 in words is "twenty-two billion, one hundred one million, two hundred ten thousand, two hundred fifty-two".