212125431102 has 128 divisors (see below), whose sum is σ = 488670658560. Its totient is φ = 60887877120.

The previous prime is 212125431059. The next prime is 212125431103. The reversal of 212125431102 is 201134521212.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212125431103) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 51397363 + ... + 51401489.

It is an arithmetic number, because the mean of its divisors is an integer number (3817739520).

Almost surely, 2^212125431102 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 212125431102, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (244335329280).

212125431102 is an abundant number, since it is smaller than the sum of its proper divisors (276545227458).

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

212125431102 is a wasteful number, since it uses less digits than its factorization.

212125431102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4938.

The product of its (nonzero) digits is 960, while the sum is 24.

Adding to 212125431102 its reverse (201134521212), we get a palindrome (413259952314).

The spelling of 212125431102 in words is "two hundred twelve billion, one hundred twenty-five million, four hundred thirty-one thousand, one hundred two".