1213102320031 has 4 divisors (see below), whose sum is σ = 1386402651472. Its totient is φ = 1039801988592.

The previous prime is 1213102320011. The next prime is 1213102320043. The reversal of 1213102320031 is 1300232013121.

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 1213102320031 - 2¹⁵ = 1213102287263 is a prime.

It is a super-2 number, since 2×1213102320031² (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 = 1213102319990 and 1213102320008.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213102320011) 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, 86650165710 + ... + 86650165723.

It is an arithmetic number, because the mean of its divisors is an integer number (346600662868).

Almost surely, 2^{1213102320031} is an apocalyptic number.

1213102320031 is a deficient number, since it is larger than the sum of its proper divisors (173300331441).

1213102320031 is an equidigital number, since it uses as much as digits as its factorization.

1213102320031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173300331440.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 1213102320031 its reverse (1300232013121), we get a palindrome (2513334333152).

The spelling of 1213102320031 in words is "one trillion, two hundred thirteen billion, one hundred two million, three hundred twenty thousand, thirty-one".