212161711 has 8 divisors (see below), whose sum is σ = 215370144. Its totient is φ = 208975200.

The previous prime is 212161693. The next prime is 212161723. The reversal of 212161711 is 117161212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 212161711 - 2⁵ = 212161679 is a prime.

It is a super-2 number, since 2×212161711² = 90025183228895042, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212161211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14566 + ... + 25228.

It is an arithmetic number, because the mean of its divisors is an integer number (26921268).

Almost surely, 2^212161711 is an apocalyptic number.

212161711 is a deficient number, since it is larger than the sum of its proper divisors (3208433).

212161711 is a wasteful number, since it uses less digits than its factorization.

212161711 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10961.

The product of its digits is 168, while the sum is 22.

The square root of 212161711 is about 14565.7718985298. The cubic root of 212161711 is about 596.4247672023.

The spelling of 212161711 in words is "two hundred twelve million, one hundred sixty-one thousand, seven hundred eleven".