1311022133421 has 128 divisors (see below), whose sum is σ = 2432986730496. Its totient is φ = 605949050880.

The previous prime is 1311022133387. The next prime is 1311022133437. The reversal of 1311022133421 is 1243312201131.

It is not a de Polignac number, because 1311022133421 - 2⁷ = 1311022133293 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1311022133391 and 1311022133400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311022173421) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 11833741 + ... + 11944013.

It is an arithmetic number, because the mean of its divisors is an integer number (19007708832).

Almost surely, 2^{1311022133421} is an apocalyptic number.

1311022133421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1311022133421 is a deficient number, since it is larger than the sum of its proper divisors (1121964597075).

1311022133421 is a wasteful number, since it uses less digits than its factorization.

1311022133421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110451.

The product of its (nonzero) digits is 864, while the sum is 24.

Adding to 1311022133421 its reverse (1243312201131), we get a palindrome (2554334334552).

The spelling of 1311022133421 in words is "one trillion, three hundred eleven billion, twenty-two million, one hundred thirty-three thousand, four hundred twenty-one".