21002213033131 has 4 divisors (see below), whose sum is σ = 22911505127064. Its totient is φ = 19092920939200.

The previous prime is 21002213033117. The next prime is 21002213033171. The reversal of 21002213033131 is 13133031220012.

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

It is a cyclic number.

It is not a de Polignac number, because 21002213033131 - 2¹⁹ = 21002212508843 is a prime.

It is a super-2 number, since 2×21002213033131² (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 (21002213033171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 954646046950 + ... + 954646046971.

It is an arithmetic number, because the mean of its divisors is an integer number (5727876281766).

Almost surely, 2^{21002213033131} is an apocalyptic number.

21002213033131 is a deficient number, since it is larger than the sum of its proper divisors (1909292093933).

21002213033131 is a wasteful number, since it uses less digits than its factorization.

21002213033131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1909292093932.

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

Adding to 21002213033131 its reverse (13133031220012), we get a palindrome (34135244253143).

The spelling of 21002213033131 in words is "twenty-one trillion, two billion, two hundred thirteen million, thirty-three thousand, one hundred thirty-one".