201212122110100 has 72 divisors (see below), whose sum is σ = 437213178940608. Its totient is φ = 80377463654400.

The previous prime is 201212122110073. The next prime is 201212122110101. The reversal of 201212122110100 is 1011221212102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201212122110101) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 283479847 + ... + 284188753.

It is an arithmetic number, because the mean of its divisors is an integer number (6072405263064).

Almost surely, 2^{201212122110100} is an apocalyptic number.

201212122110100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201212122110100 is an abundant number, since it is smaller than the sum of its proper divisors (236001056830508).

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

201212122110100 is a wasteful number, since it uses less digits than its factorization.

201212122110100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 712705 (or 712698 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 201212122110100 its reverse (1011221212102), we get a palindrome (202223343322202).

The spelling of 201212122110100 in words is "two hundred one trillion, two hundred twelve billion, one hundred twenty-two million, one hundred ten thousand, one hundred".