212213031100 has 144 divisors (see below), whose sum is σ = 561002982400. Its totient is φ = 68056485120.

The previous prime is 212213031073. The next prime is 212213031113. The reversal of 212213031100 is 1130312212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 949714 + ... + 1151686.

Almost surely, 2^212213031100 is an apocalyptic number.

212213031100 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 212213031100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (280501491200).

212213031100 is an abundant number, since it is smaller than the sum of its proper divisors (348789951300).

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

212213031100 is a wasteful number, since it uses less digits than its factorization.

212213031100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202092 (or 202085 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 212213031100 its reverse (1130312212), we get a palindrome (213343343312).

The spelling of 212213031100 in words is "two hundred twelve billion, two hundred thirteen million, thirty-one thousand, one hundred".