212021113122 has 96 divisors (see below), whose sum is σ = 571742720640. Its totient is φ = 55289329920.

The previous prime is 212021113079. The next prime is 212021113163. The reversal of 212021113122 is 221311120212.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 212021113095 and 212021113104.

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, 581404 + ... + 872967.

It is an arithmetic number, because the mean of its divisors is an integer number (5955653340).

Almost surely, 2^212021113122 is an apocalyptic number.

212021113122 is an abundant number, since it is smaller than the sum of its proper divisors (359721607518).

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

212021113122 is a wasteful number, since it uses less digits than its factorization.

212021113122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1454488 (or 1454485 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 212021113122 its reverse (221311120212), we get a palindrome (433332233334).

The spelling of 212021113122 in words is "two hundred twelve billion, twenty-one million, one hundred thirteen thousand, one hundred twenty-two".