201213100 has 36 divisors (see below), whose sum is σ = 476328888. Its totient is φ = 73168000.

The previous prime is 201213091. The next prime is 201213101. The reversal of 201213100 is 1312102.

It is a super-2 number, since 2×201213100² = 80973423223220000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is not an unprimeable number, because it can be changed into a prime (201213101) 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, 90361 + ... + 92560.

It is an arithmetic number, because the mean of its divisors is an integer number (13231358).

Almost surely, 2^201213100 is an apocalyptic number.

201213100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201213100 is an abundant number, since it is smaller than the sum of its proper divisors (275115788).

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

201213100 is a wasteful number, since it uses less digits than its factorization.

201213100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182946 (or 182939 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 201213100 is about 14184.9603453799. The cubic root of 201213100 is about 585.9835404060.

Adding to 201213100 its reverse (1312102), we get a palindrome (202525202).

The spelling of 201213100 in words is "two hundred one million, two hundred thirteen thousand, one hundred".