21120130213 has 64 divisors (see below), whose sum is σ = 28185034752. Its totient is φ = 15365687040.

The previous prime is 21120130211. The next prime is 21120130243. The reversal of 21120130213 is 31203102112.

It is a cyclic number.

It is not a de Polignac number, because 21120130213 - 2¹ = 21120130211 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21120130211) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 10574931 + ... + 10576927.

It is an arithmetic number, because the mean of its divisors is an integer number (440391168).

Almost surely, 2^21120130213 is an apocalyptic number.

21120130213 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

21120130213 is a deficient number, since it is larger than the sum of its proper divisors (7064904539).

21120130213 is a wasteful number, since it uses less digits than its factorization.

21120130213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2234.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 21120130213 its reverse (31203102112), we get a palindrome (52323232325).

The spelling of 21120130213 in words is "twenty-one billion, one hundred twenty million, one hundred thirty thousand, two hundred thirteen".