210221112011640 has 128 divisors (see below), whose sum is σ = 631914127341120. Its totient is φ = 55947870720000.

The previous prime is 210221112011639. The next prime is 210221112011719. The reversal of 210221112011640 is 46110211122012.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 210221112011640.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 150806322 + ... + 152193918.

Almost surely, 2^{210221112011640} is an apocalyptic number.

210221112011640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

210221112011640 is an abundant number, since it is smaller than the sum of its proper divisors (421693015329480).

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

210221112011640 is a wasteful number, since it uses less digits than its factorization.

210221112011640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1390113 (or 1390109 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 24.

Adding to 210221112011640 its reverse (46110211122012), we get a palindrome (256331323133652).

The spelling of 210221112011640 in words is "two hundred ten trillion, two hundred twenty-one billion, one hundred twelve million, eleven thousand, six hundred forty".