1212403204031 has 16 divisors (see below), whose sum is σ = 1315542927360. Its totient is φ = 1113425494560.

The previous prime is 1212403203961. The next prime is 1212403204043. The reversal of 1212403204031 is 1304023042121.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1212403204031 is a prime.

It is a super-2 number, since 2×1212403204031² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1212403203988 and 1212403204006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212403204081) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2991431 + ... + 3372456.

It is an arithmetic number, because the mean of its divisors is an integer number (82221432960).

Almost surely, 2^{1212403204031} is an apocalyptic number.

1212403204031 is a deficient number, since it is larger than the sum of its proper divisors (103139723329).

1212403204031 is a wasteful number, since it uses less digits than its factorization.

1212403204031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6364214.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 1212403204031 its reverse (1304023042121), we get a palindrome (2516426246152).

The spelling of 1212403204031 in words is "one trillion, two hundred twelve billion, four hundred three million, two hundred four thousand, thirty-one".