21000123000311 has 16 divisors (see below), whose sum is σ = 25852040438784. Its totient is φ = 16611795015264.

The previous prime is 21000123000299. The next prime is 21000123000331. The reversal of 21000123000311 is 11300032100012.

It is a cyclic number.

It is not a de Polignac number, because 21000123000311 - 2²⁶ = 21000055891447 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21000123000331) 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, 25191215 + ... + 26011488.

It is an arithmetic number, because the mean of its divisors is an integer number (1615752527424).

Almost surely, 2^{21000123000311} is an apocalyptic number.

21000123000311 is a deficient number, since it is larger than the sum of its proper divisors (4851917438473).

21000123000311 is a wasteful number, since it uses less digits than its factorization.

21000123000311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51207230.

The product of its (nonzero) digits is 36, while the sum is 14.

Adding to 21000123000311 its reverse (11300032100012), we get a palindrome (32300155100323).

The spelling of 21000123000311 in words is "twenty-one trillion, one hundred twenty-three million, three hundred eleven", and thus it is an aban number.