1213102123031 has 4 divisors (see below), whose sum is σ = 1214098921392. Its totient is φ = 1212105324672.

The previous prime is 1213102123027. The next prime is 1213102123061. The reversal of 1213102123031 is 1303212013121.

It is a happy number.

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 1213102123031 - 2² = 1213102123027 is a prime.

It is a super-2 number, since 2×1213102123031² (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 = 1213102122994 and 1213102123012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213102123001) 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, 498397355 + ... + 498399788.

It is an arithmetic number, because the mean of its divisors is an integer number (303524730348).

Almost surely, 2^{1213102123031} is an apocalyptic number.

1213102123031 is a deficient number, since it is larger than the sum of its proper divisors (996798361).

1213102123031 is an equidigital number, since it uses as much as digits as its factorization.

1213102123031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 996798360.

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

Adding to 1213102123031 its reverse (1303212013121), we get a palindrome (2516314136152).

The spelling of 1213102123031 in words is "one trillion, two hundred thirteen billion, one hundred two million, one hundred twenty-three thousand, thirty-one".