211650072020520 has 128 divisors (see below), whose sum is σ = 737956667750400. Its totient is φ = 47557207454976.

The previous prime is 211650072020503. The next prime is 211650072020521. The reversal of 211650072020520 is 25020270056112.

It is not an unprimeable number, because it can be changed into a prime (211650072020521) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2135241724 + ... + 2135340843.

It is an arithmetic number, because the mean of its divisors is an integer number (5765286466800).

Almost surely, 2^{211650072020520} is an apocalyptic number.

211650072020520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211650072020520 is an abundant number, since it is smaller than the sum of its proper divisors (526306595729880).

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

211650072020520 is a wasteful number, since it uses less digits than its factorization.

211650072020520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4270582647 (or 4270582643 counting only the distinct ones).

The product of its (nonzero) digits is 16800, while the sum is 33.

The spelling of 211650072020520 in words is "two hundred eleven trillion, six hundred fifty billion, seventy-two million, twenty thousand, five hundred twenty".