211320020121 has 16 divisors (see below), whose sum is σ = 322059080064. Its totient is φ = 120736439424.

The previous prime is 211320020111. The next prime is 211320020159. The reversal of 211320020121 is 121020023112.

It is not a de Polignac number, because 211320020121 - 2⁹ = 211320019609 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 211320020121.

It is not an unprimeable number, because it can be changed into a prime (211320020101) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 598026 + ... + 883331.

It is an arithmetic number, because the mean of its divisors is an integer number (20128692504).

Almost surely, 2^211320020121 is an apocalyptic number.

211320020121 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

211320020121 is a deficient number, since it is larger than the sum of its proper divisors (110739059943).

211320020121 is a wasteful number, since it uses less digits than its factorization.

211320020121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1488160.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 211320020121 its reverse (121020023112), we get a palindrome (332340043233).

The spelling of 211320020121 in words is "two hundred eleven billion, three hundred twenty million, twenty thousand, one hundred twenty-one".