211121113111320 has 64 divisors (see below), whose sum is σ = 634521224977920. Its totient is φ = 56196040328064.

The previous prime is 211121113111261. The next prime is 211121113111343. The reversal of 211121113111320 is 23111311121112.

It is a super-2 number, since 2×211121113111320² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1608108592 + ... + 1608239871.

It is an arithmetic number, because the mean of its divisors is an integer number (9914394140280).

Almost surely, 2^{211121113111320} is an apocalyptic number.

211121113111320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211121113111320 is an abundant number, since it is smaller than the sum of its proper divisors (423400111866600).

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

211121113111320 is a wasteful number, since it uses less digits than its factorization.

211121113111320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3216349024 (or 3216349020 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 21.

Adding to 211121113111320 its reverse (23111311121112), we get a palindrome (234232424232432).

The spelling of 211121113111320 in words is "two hundred eleven trillion, one hundred twenty-one billion, one hundred thirteen million, one hundred eleven thousand, three hundred twenty".