22101220180 has 48 divisors (see below), whose sum is σ = 50019765264. Its totient is φ = 8154408960.

The previous prime is 22101220157. The next prime is 22101220181. The reversal of 22101220180 is 8102210122.

It can be written as a sum of positive squares in 8 ways, for example, as 125529616 + 21975690564 = 11204^2 + 148242^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22101220181) 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, 328284 + ... + 389836.

It is an arithmetic number, because the mean of its divisors is an integer number (1042078443).

Almost surely, 2^22101220180 is an apocalyptic number.

22101220180 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22101220180 is an abundant number, since it is smaller than the sum of its proper divisors (27918545084).

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

22101220180 is a wasteful number, since it uses less digits than its factorization.

22101220180 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62956 (or 62954 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

The spelling of 22101220180 in words is "twenty-two billion, one hundred one million, two hundred twenty thousand, one hundred eighty".