212013012123 has 12 divisors (see below), whose sum is σ = 334081110168. Its totient is φ = 128492734560.

The previous prime is 212013012119. The next prime is 212013012131. The reversal of 212013012123 is 321210310212.

It is not a de Polignac number, because 212013012123 - 2² = 212013012119 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 212013012096 and 212013012105.

It is not an unprimeable number, because it can be changed into a prime (212013012103) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1070772690 + ... + 1070772887.

It is an arithmetic number, because the mean of its divisors is an integer number (27840092514).

Almost surely, 2^212013012123 is an apocalyptic number.

212013012123 is a deficient number, since it is larger than the sum of its proper divisors (122068098045).

212013012123 is a wasteful number, since it uses less digits than its factorization.

212013012123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2141545594 (or 2141545591 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 212013012123 its reverse (321210310212), we get a palindrome (533223322335).

The spelling of 212013012123 in words is "two hundred twelve billion, thirteen million, twelve thousand, one hundred twenty-three".