212031222100 has 36 divisors (see below), whose sum is σ = 460740795424. Its totient is φ = 84695798880.

The previous prime is 212031222089. The next prime is 212031222121. The reversal of 212031222100 is 1222130212.

It is a happy number.

It is a congruent number.

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, 1385562 + ... + 1530961.

Almost surely, 2^212031222100 is an apocalyptic number.

212031222100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212031222100 is an abundant number, since it is smaller than the sum of its proper divisors (248709573324).

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

212031222100 is a wasteful number, since it uses less digits than its factorization.

212031222100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2917264 (or 2917257 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 212031222100 its reverse (1222130212), we get a palindrome (213253352312).

It can be divided in two parts, 2120312 and 22100, that added together give a palindrome (2142412).

The spelling of 212031222100 in words is "two hundred twelve billion, thirty-one million, two hundred twenty-two thousand, one hundred".