213220302123 has 32 divisors (see below), whose sum is σ = 290623348224. Its totient is φ = 139015844352.

The previous prime is 213220302103. The next prime is 213220302133. The reversal of 213220302123 is 321203022312.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-213220302123 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 213220302123.

It is not an unprimeable number, because it can be changed into a prime (213220302103) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19278211 + ... + 19289267.

It is an arithmetic number, because the mean of its divisors is an integer number (9081979632).

Almost surely, 2^213220302123 is an apocalyptic number.

213220302123 is a deficient number, since it is larger than the sum of its proper divisors (77403046101).

213220302123 is a wasteful number, since it uses less digits than its factorization.

213220302123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11811.

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 213220302123 its reverse (321203022312), we get a palindrome (534423324435).

The spelling of 213220302123 in words is "two hundred thirteen billion, two hundred twenty million, three hundred two thousand, one hundred twenty-three".