1221111314031 has 32 divisors (see below), whose sum is σ = 1886406105600. Its totient is φ = 688155277824.

The previous prime is 1221111313999. The next prime is 1221111314057. The reversal of 1221111314031 is 1304131111221.

It is a happy number.

It is not a de Polignac number, because 1221111314031 - 2⁵ = 1221111313999 is a prime.

It is a super-2 number, since 2×1221111314031² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 1221111313989 and 1221111314007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221111319031) 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, 19973596 + ... + 20034638.

It is an arithmetic number, because the mean of its divisors is an integer number (58950190800).

Almost surely, 2^{1221111314031} is an apocalyptic number.

1221111314031 is a deficient number, since it is larger than the sum of its proper divisors (665294791569).

1221111314031 is a wasteful number, since it uses less digits than its factorization.

1221111314031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74175.

The product of its (nonzero) digits is 144, while the sum is 21.

Adding to 1221111314031 its reverse (1304131111221), we get a palindrome (2525242425252).

The spelling of 1221111314031 in words is "one trillion, two hundred twenty-one billion, one hundred eleven million, three hundred fourteen thousand, thirty-one".