213432121123 has 32 divisors (see below), whose sum is σ = 242447192064. Its totient is φ = 186535440000.

The previous prime is 213432121093. The next prime is 213432121153. The reversal of 213432121123 is 321121234312.

It is an interprime number because it is at equal distance from previous prime (213432121093) and next prime (213432121153).

It is not a de Polignac number, because 213432121123 - 2⁹ = 213432120611 is a prime.

It is a super-2 number, since 2×213432121123² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (213432121153) 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, 3719833 + ... + 3776773.

It is an arithmetic number, because the mean of its divisors is an integer number (7576474752).

Almost surely, 2^213432121123 is an apocalyptic number.

213432121123 is a deficient number, since it is larger than the sum of its proper divisors (29015070941).

213432121123 is a wasteful number, since it uses less digits than its factorization.

213432121123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57187.

The product of its digits is 1728, while the sum is 25.

Adding to 213432121123 its reverse (321121234312), we get a palindrome (534553355435).

The spelling of 213432121123 in words is "two hundred thirteen billion, four hundred thirty-two million, one hundred twenty-one thousand, one hundred twenty-three".