1311022112421 has 32 divisors (see below), whose sum is σ = 2066735658240. Its totient is φ = 723287609856.

The previous prime is 1311022112401. The next prime is 1311022112429. The reversal of 1311022112421 is 1242112201131.

It is not a de Polignac number, because 1311022112421 - 2⁶ = 1311022112357 is a prime.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311022112429) 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, 17341315 + ... + 17416751.

It is an arithmetic number, because the mean of its divisors is an integer number (64585489320).

Almost surely, 2^{1311022112421} is an apocalyptic number.

It is an amenable number.

1311022112421 is a deficient number, since it is larger than the sum of its proper divisors (755713545819).

1311022112421 is a wasteful number, since it uses less digits than its factorization.

1311022112421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104013.

The product of its (nonzero) digits is 192, while the sum is 21.

Adding to 1311022112421 its reverse (1242112201131), we get a palindrome (2553134313552).

The spelling of 1311022112421 in words is "one trillion, three hundred eleven billion, twenty-two million, one hundred twelve thousand, four hundred twenty-one".