1213532212331 has 4 divisors (see below), whose sum is σ = 1213606147992. Its totient is φ = 1213458276672.

The previous prime is 1213532212283. The next prime is 1213532212391. The reversal of 1213532212331 is 1332122353121.

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

It is a cyclic number.

It is not a de Polignac number, because 1213532212331 - 2⁶ = 1213532212267 is a prime.

It is a super-2 number, since 2×1213532212331² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1213532212294 and 1213532212303.

It is not an unprimeable number, because it can be changed into a prime (1213532212391) 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, 36943205 + ... + 36976038.

It is an arithmetic number, because the mean of its divisors is an integer number (303401536998).

Almost surely, 2^{1213532212331} is an apocalyptic number.

1213532212331 is a deficient number, since it is larger than the sum of its proper divisors (73935661).

1213532212331 is an equidigital number, since it uses as much as digits as its factorization.

1213532212331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73935660.

The product of its digits is 6480, while the sum is 29.

Adding to 1213532212331 its reverse (1332122353121), we get a palindrome (2545654565452).

The spelling of 1213532212331 in words is "one trillion, two hundred thirteen billion, five hundred thirty-two million, two hundred twelve thousand, three hundred thirty-one".