211121111010 has 32 divisors (see below), whose sum is σ = 507222414720. Its totient is φ = 56239879808.

The previous prime is 211121110987. The next prime is 211121111027. The reversal of 211121111010 is 10111121112.

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, 3663630 + ... + 3720809.

It is an arithmetic number, because the mean of its divisors is an integer number (15850700460).

Almost surely, 2^211121111010 is an apocalyptic number.

211121111010 is an abundant number, since it is smaller than the sum of its proper divisors (296101303710).

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

211121111010 is a wasteful number, since it uses less digits than its factorization.

211121111010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7385402.

The product of its (nonzero) digits is 4, while the sum is 12.

Adding to 211121111010 its reverse (10111121112), we get a palindrome (221232232122).

The spelling of 211121111010 in words is "two hundred eleven billion, one hundred twenty-one million, one hundred eleven thousand, ten".