21120212033131 has 4 divisors (see below), whose sum is σ = 22038482121552. Its totient is φ = 20201941944712.

The previous prime is 21120212033113. The next prime is 21120212033197. The reversal of 21120212033131 is 13133021202112.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 21120212033131 - 2⁵ = 21120212033099 is a prime.

It is a super-2 number, since 2×21120212033131² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21120212039131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 459135044176 + ... + 459135044221.

It is an arithmetic number, because the mean of its divisors is an integer number (5509620530388).

Almost surely, 2^{21120212033131} is an apocalyptic number.

21120212033131 is a deficient number, since it is larger than the sum of its proper divisors (918270088421).

21120212033131 is an equidigital number, since it uses as much as digits as its factorization.

21120212033131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 918270088420.

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 21120212033131 its reverse (13133021202112), we get a palindrome (34253233235243).

The spelling of 21120212033131 in words is "twenty-one trillion, one hundred twenty billion, two hundred twelve million, thirty-three thousand, one hundred thirty-one".