123201131213 has 4 divisors (see below), whose sum is σ = 123479238048. Its totient is φ = 122923024380.

The previous prime is 123201131203. The next prime is 123201131219. The reversal of 123201131213 is 312131102321.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 312131102321 = 281 ⋅1110786841.

It is a cyclic number.

It is not a de Polignac number, because 123201131213 - 2⁶ = 123201131149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123201131219) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 139052753 + ... + 139053638.

It is an arithmetic number, because the mean of its divisors is an integer number (30869809512).

Almost surely, 2^123201131213 is an apocalyptic number.

It is an amenable number.

123201131213 is a deficient number, since it is larger than the sum of its proper divisors (278106835).

123201131213 is an equidigital number, since it uses as much as digits as its factorization.

123201131213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278106834.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 123201131213 its reverse (312131102321), we get a palindrome (435332233534).

The spelling of 123201131213 in words is "one hundred twenty-three billion, two hundred one million, one hundred thirty-one thousand, two hundred thirteen".