211051223100 has 54 divisors (see below), whose sum is σ = 661528336560. Its totient is φ = 56280325920.

The previous prime is 211051223099. The next prime is 211051223111. The reversal of 211051223100 is 1322150112.

211051223100 is a `hidden beast` number, since 21 + 10 + 512 + 23 + 100 = 666.

It is a super-2 number, since 2×211051223100² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 117249780 + ... + 117251579.

Almost surely, 2^211051223100 is an apocalyptic number.

211051223100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211051223100 is an abundant number, since it is smaller than the sum of its proper divisors (450477113460).

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

211051223100 is a wasteful number, since it uses less digits than its factorization.

211051223100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 234501379 (or 234501369 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

Adding to 211051223100 its reverse (1322150112), we get a palindrome (212373373212).

The spelling of 211051223100 in words is "two hundred eleven billion, fifty-one million, two hundred twenty-three thousand, one hundred".