211090920860 has 12 divisors (see below), whose sum is σ = 443290933848. Its totient is φ = 84436368336.

The previous prime is 211090920857. The next prime is 211090920913. The reversal of 211090920860 is 68029090112.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5277273002 + ... + 5277273041.

It is an arithmetic number, because the mean of its divisors is an integer number (36940911154).

Almost surely, 2^211090920860 is an apocalyptic number.

211090920860 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211090920860 is an abundant number, since it is smaller than the sum of its proper divisors (232200012988).

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

211090920860 is a wasteful number, since it uses less digits than its factorization.

211090920860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10554546052 (or 10554546050 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 38.

The spelling of 211090920860 in words is "two hundred eleven billion, ninety million, nine hundred twenty thousand, eight hundred sixty".