231213131221202 has 32 divisors (see below), whose sum is σ = 380549884216320. Its totient is φ = 104699016227520.

The previous prime is 231213131221159. The next prime is 231213131221249. The reversal of 231213131221202 is 202122131312132.

It is a super-2 number, since 2×231213131221202² (a number of 30 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (26).

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 in 15 ways as a sum of consecutive naturals, for example, 117686699 + ... + 119635217.

It is an arithmetic number, because the mean of its divisors is an integer number (11892183881760).

Almost surely, 2^{231213131221202} is an apocalyptic number.

231213131221202 is a deficient number, since it is larger than the sum of its proper divisors (149336752995118).

231213131221202 is a wasteful number, since it uses less digits than its factorization.

231213131221202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2034698.

The product of its (nonzero) digits is 1728, while the sum is 26.

Adding to 231213131221202 its reverse (202122131312132), we get a palindrome (433335262533334).

The spelling of 231213131221202 in words is "two hundred thirty-one trillion, two hundred thirteen billion, one hundred thirty-one million, two hundred twenty-one thousand, two hundred two".