213012210123 has 12 divisors (see below), whose sum is σ = 307714341480. Its totient is φ = 141994276416.

The previous prime is 213012210109. The next prime is 213012210139. The reversal of 213012210123 is 321012210312.

213012210123 is a `hidden beast` number, since 21 + 301 + 221 + 0 + 123 = 666.

It is not a de Polignac number, because 213012210123 - 2¹³ = 213012201931 is a prime.

It is a super-2 number, since 2×213012210123² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 213012210096 and 213012210105.

It is not an unprimeable number, because it can be changed into a prime (213012210923) 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, 1057561 + ... + 1242762.

It is an arithmetic number, because the mean of its divisors is an integer number (25642861790).

Almost surely, 2^213012210123 is an apocalyptic number.

213012210123 is a deficient number, since it is larger than the sum of its proper divisors (94702131357).

213012210123 is a wasteful number, since it uses less digits than its factorization.

213012210123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2310618 (or 2310615 counting only the distinct ones).

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

Adding to 213012210123 its reverse (321012210312), we get a palindrome (534024420435).

The spelling of 213012210123 in words is "two hundred thirteen billion, twelve million, two hundred ten thousand, one hundred twenty-three".