201022122100 has 36 divisors (see below), whose sum is σ = 442193610124. Its totient is φ = 79307354880.

The previous prime is 201022122097. The next prime is 201022122101. The reversal of 201022122100 is 1221220102.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 28914961936 + 172107160164 = 170044^2 + 414858^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201022122101) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13761339 + ... + 13775938.

Almost surely, 2^201022122100 is an apocalyptic number.

201022122100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201022122100 is an abundant number, since it is smaller than the sum of its proper divisors (241171488024).

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

201022122100 is a wasteful number, since it uses less digits than its factorization.

201022122100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27537364 (or 27537357 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 201022122100 its reverse (1221220102), we get a palindrome (202243342202).

The spelling of 201022122100 in words is "two hundred one billion, twenty-two million, one hundred twenty-two thousand, one hundred".