211021212120 has 32 divisors (see below), whose sum is σ = 633063636720. Its totient is φ = 56272323200.

The previous prime is 211021212119. The next prime is 211021212137. The reversal of 211021212120 is 21212120112.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 211021212120.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 879254931 + ... + 879255170.

Almost surely, 2^211021212120 is an apocalyptic number.

211021212120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211021212120 is an abundant number, since it is smaller than the sum of its proper divisors (422042424600).

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

211021212120 is a wasteful number, since it uses less digits than its factorization.

211021212120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1758510115 (or 1758510111 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 211021212120 its reverse (21212120112), we get a palindrome (232233332232).

The spelling of 211021212120 in words is "two hundred eleven billion, twenty-one million, two hundred twelve thousand, one hundred twenty".