231001211222242 has 4 divisors (see below), whose sum is σ = 346501816833366. Its totient is φ = 115500605611120.

The previous prime is 231001211222167. The next prime is 231001211222269. The reversal of 231001211222242 is 242222112100132.

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., 177156126620001 + 53845084602241 = 13310001^2 + 7337921^2 .

It is a super-2 number, since 2×231001211222242² (a number of 30 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57750302805559 + ... + 57750302805562.

Almost surely, 2^{231001211222242} is an apocalyptic number.

231001211222242 is a deficient number, since it is larger than the sum of its proper divisors (115500605611124).

231001211222242 is a wasteful number, since it uses less digits than its factorization.

231001211222242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115500605611123.

The product of its (nonzero) digits is 1536, while the sum is 25.

Adding to 231001211222242 its reverse (242222112100132), we get a palindrome (473223323322374).

The spelling of 231001211222242 in words is "two hundred thirty-one trillion, one billion, two hundred eleven million, two hundred twenty-two thousand, two hundred forty-two".