21312114411 has 16 divisors (see below), whose sum is σ = 32480748288. Its totient is φ = 12176421600.

The previous prime is 21312114409. The next prime is 21312114443. The reversal of 21312114411 is 11441121312.

It is not a de Polignac number, because 21312114411 - 2¹ = 21312114409 is a prime.

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

It is not an unprimeable number, because it can be changed into a prime (21312114611) 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, 61096 + ... + 215306.

It is an arithmetic number, because the mean of its divisors is an integer number (2030046768).

Almost surely, 2^21312114411 is an apocalyptic number.

21312114411 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

21312114411 is a deficient number, since it is larger than the sum of its proper divisors (11168633877).

21312114411 is a wasteful number, since it uses less digits than its factorization.

21312114411 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160802.

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

Adding to 21312114411 its reverse (11441121312), we get a palindrome (32753235723).

The spelling of 21312114411 in words is "twenty-one billion, three hundred twelve million, one hundred fourteen thousand, four hundred eleven".