201212120100 has 36 divisors (see below), whose sum is σ = 582173735024. Its totient is φ = 53656565280.

The previous prime is 201212120093. The next prime is 201212120111. The reversal of 201212120100 is 1021212102.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 335353234 + ... + 335353833.

Almost surely, 2^201212120100 is an apocalyptic number.

201212120100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201212120100 is an abundant number, since it is smaller than the sum of its proper divisors (380961614924).

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

201212120100 is a wasteful number, since it uses less digits than its factorization.

201212120100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 670707084 (or 670707077 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 201212120100 its reverse (1021212102), we get a palindrome (202233332202).

The spelling of 201212120100 in words is "two hundred one billion, two hundred twelve million, one hundred twenty thousand, one hundred".