21010103002131 has 24 divisors (see below), whose sum is σ = 29684442836160. Its totient is φ = 13181660182800.

The previous prime is 21010103002081. The next prime is 21010103002201. The reversal of 21010103002131 is 13120030101012.

It is a happy number.

It is not a de Polignac number, because 21010103002131 - 2¹⁹ = 21010102477843 is a prime.

It is a super-2 number, since 2×21010103002131² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21010103002131.

It is not an unprimeable number, because it can be changed into a prime (21010103012131) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6783285 + ... + 9382598.

It is an arithmetic number, because the mean of its divisors is an integer number (1236851784840).

Almost surely, 2^{21010103002131} is an apocalyptic number.

21010103002131 is a deficient number, since it is larger than the sum of its proper divisors (8674339834029).

21010103002131 is a wasteful number, since it uses less digits than its factorization.

21010103002131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16166207 (or 16166056 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 21010103002131 its reverse (13120030101012), we get a palindrome (34130133103143).

The spelling of 21010103002131 in words is "twenty-one trillion, ten billion, one hundred three million, two thousand, one hundred thirty-one".