21111202023131 has 8 divisors (see below), whose sum is σ = 23035341229824. Its totient is φ = 19187885986920.

The previous prime is 21111202023083. The next prime is 21111202023133. The reversal of 21111202023131 is 13132020211112.

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

It is a cyclic number.

It is not a de Polignac number, because 21111202023131 - 2²⁶ = 21111134914267 is a prime.

It is a super-2 number, since 2×21111202023131² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21111202023133) 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, 205738991 + ... + 205841576.

It is an arithmetic number, because the mean of its divisors is an integer number (2879417653728).

Almost surely, 2^{21111202023131} is an apocalyptic number.

21111202023131 is a deficient number, since it is larger than the sum of its proper divisors (1924139206693).

21111202023131 is a wasteful number, since it uses less digits than its factorization.

21111202023131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 411585241.

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 21111202023131 its reverse (13132020211112), we get a palindrome (34243222234243).

The spelling of 21111202023131 in words is "twenty-one trillion, one hundred eleven billion, two hundred two million, twenty-three thousand, one hundred thirty-one".