231210212211442 has 4 divisors (see below), whose sum is σ = 346815318317166. Its totient is φ = 115605106105720.

The previous prime is 231210212211383. The next prime is 231210212211449. The reversal of 231210212211442 is 244112212012132.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 169816578014161 + 61393634197281 = 13031369^2 + 7835409^2 .

It is a super-2 number, since 2×231210212211442² (a number of 30 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 231210212211442.

It is not an unprimeable number, because it can be changed into a prime (231210212211449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57802553052859 + ... + 57802553052862.

Almost surely, 2^{231210212211442} is an apocalyptic number.

231210212211442 is a deficient number, since it is larger than the sum of its proper divisors (115605106105724).

231210212211442 is a wasteful number, since it uses less digits than its factorization.

231210212211442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115605106105723.

The product of its (nonzero) digits is 3072, while the sum is 28.

Adding to 231210212211442 its reverse (244112212012132), we get a palindrome (475322424223574).

The spelling of 231210212211442 in words is "two hundred thirty-one trillion, two hundred ten billion, two hundred twelve million, two hundred eleven thousand, four hundred forty-two".