21010012012130 has 16 divisors (see below), whose sum is σ = 38840130315000. Its totient is φ = 8176869539712.

The previous prime is 21010012012117. The next prime is 21010012012133. The reversal of 21010012012130 is 3121021001012.

It can be written as a sum of positive squares in 4 ways, for example, as 14793462135529 + 6216549876601 = 3846227^2 + 2493301^2 .

It is not an unprimeable number, because it can be changed into a prime (21010012012133) 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, 28391907755 + ... + 28391908494.

Almost surely, 2^{21010012012130} is an apocalyptic number.

21010012012130 is a deficient number, since it is larger than the sum of its proper divisors (17830118302870).

21010012012130 is a wasteful number, since it uses less digits than its factorization.

21010012012130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56783816293.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 21010012012130 its reverse (3121021001012), we get a palindrome (24131033013142).

The spelling of 21010012012130 in words is "twenty-one trillion, ten billion, twelve million, twelve thousand, one hundred thirty".