201213223100 has 54 divisors (see below), whose sum is σ = 441958223280. Its totient is φ = 79515314720.

The previous prime is 201213223097. The next prime is 201213223117. The reversal of 201213223100 is 1322312102.

It is a super-2 number, since 2×201213223100² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 542861 + ... + 834939.

Almost surely, 2^201213223100 is an apocalyptic number.

201213223100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 201213223100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (220979111640).

201213223100 is an abundant number, since it is smaller than the sum of its proper divisors (240745000180).

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

201213223100 is a wasteful number, since it uses less digits than its factorization.

201213223100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 292259 (or 292169 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 201213223100 its reverse (1322312102), we get a palindrome (202535535202).

The spelling of 201213223100 in words is "two hundred one billion, two hundred thirteen million, two hundred twenty-three thousand, one hundred".