211231121211100 has 72 divisors (see below), whose sum is σ = 480179694657600. Its totient is φ = 80546271187200.

The previous prime is 211231121211031. The next prime is 211231121211137. The reversal of 211231121211100 is 1112121132112.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 460772911 + ... + 461231110.

It is an arithmetic number, because the mean of its divisors is an integer number (6669162425800).

Almost surely, 2^{211231121211100} is an apocalyptic number.

211231121211100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211231121211100 is an abundant number, since it is smaller than the sum of its proper divisors (268948573446500).

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

211231121211100 is a wasteful number, since it uses less digits than its factorization.

211231121211100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 922004143 (or 922004136 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 19.

Adding to 211231121211100 its reverse (1112121132112), we get a palindrome (212343242343212).

The spelling of 211231121211100 in words is "two hundred eleven trillion, two hundred thirty-one billion, one hundred twenty-one million, two hundred eleven thousand, one hundred".