212161065123 has 16 divisors (see below), whose sum is σ = 323495540480. Its totient is φ = 121158961056.

The previous prime is 212161065119. The next prime is 212161065157. The reversal of 212161065123 is 321560161212.

It is not a de Polignac number, because 212161065123 - 2² = 212161065119 is a prime.

It is not an unprimeable number, because it can be changed into a prime (212161069123) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3129553 + ... + 3196626.

It is an arithmetic number, because the mean of its divisors is an integer number (20218471280).

Almost surely, 2^212161065123 is an apocalyptic number.

212161065123 is a deficient number, since it is larger than the sum of its proper divisors (111334475357).

212161065123 is a wasteful number, since it uses less digits than its factorization.

212161065123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6327786.

The product of its (nonzero) digits is 4320, while the sum is 30.

The spelling of 212161065123 in words is "two hundred twelve billion, one hundred sixty-one million, sixty-five thousand, one hundred twenty-three".