21312000131233 has 8 divisors (see below), whose sum is σ = 24356847356352. Its totient is φ = 18267221850576.

The previous prime is 21312000131183. The next prime is 21312000131263. The reversal of 21312000131233 is 33213100021312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21312000131233 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21312000131263) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16572010 + ... + 17811667.

It is an arithmetic number, because the mean of its divisors is an integer number (3044605919544).

Almost surely, 2^{21312000131233} is an apocalyptic number.

It is an amenable number.

21312000131233 is a deficient number, since it is larger than the sum of its proper divisors (3044847225119).

21312000131233 is an equidigital number, since it uses as much as digits as its factorization.

21312000131233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34472231.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 21312000131233 its reverse (33213100021312), we get a palindrome (54525100152545).

The spelling of 21312000131233 in words is "twenty-one trillion, three hundred twelve billion, one hundred thirty-one thousand, two hundred thirty-three".