1226397197931 has 32 divisors (see below), whose sum is σ = 1743645035520. Its totient is φ = 764073494016.

The previous prime is 1226397197887. The next prime is 1226397197951. The reversal of 1226397197931 is 1397917936221.

It is not a de Polignac number, because 1226397197931 - 2⁶ = 1226397197867 is a prime.

It is a super-2 number, since 2×1226397197931² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1226397197951) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4084605 + ... + 4374561.

It is an arithmetic number, because the mean of its divisors is an integer number (54488907360).

Almost surely, 2^{1226397197931} is an apocalyptic number.

1226397197931 is a deficient number, since it is larger than the sum of its proper divisors (517247837589).

1226397197931 is a wasteful number, since it uses less digits than its factorization.

1226397197931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 290563.

The product of its digits is 7715736, while the sum is 60.

The spelling of 1226397197931 in words is "one trillion, two hundred twenty-six billion, three hundred ninety-seven million, one hundred ninety-seven thousand, nine hundred thirty-one".