211681124 has 6 divisors (see below), whose sum is σ = 370441974. Its totient is φ = 105840560.

The previous prime is 211681111. The next prime is 211681133. The reversal of 211681124 is 421186112.

It can be written as a sum of positive squares in only one way, i.e., 209670400 + 2010724 = 14480^2 + 1418^2 .

It is a junction number, because it is equal to n+sod(n) for n = 211681093 and 211681102.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26460137 + ... + 26460144.

It is an arithmetic number, because the mean of its divisors is an integer number (61740329).

Almost surely, 2^211681124 is an apocalyptic number.

It is an amenable number.

211681124 is a deficient number, since it is larger than the sum of its proper divisors (158760850).

211681124 is a wasteful number, since it uses less digits than its factorization.

211681124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52920285 (or 52920283 counting only the distinct ones).

The product of its digits is 768, while the sum is 26.

The square root of 211681124 is about 14549.2654110096. The cubic root of 211681124 is about 595.9740878784.

The spelling of 211681124 in words is "two hundred eleven million, six hundred eighty-one thousand, one hundred twenty-four".