21311130123013 has 64 divisors (see below), whose sum is σ = 24056049600000. Its totient is φ = 18760316387328.

The previous prime is 21311130122987. The next prime is 21311130123029. The reversal of 21311130123013 is 31032103111312.

It is not a de Polignac number, because 21311130123013 - 2⁵ = 21311130122981 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21311130124013) 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, 22939859733 + ... + 22939860661.

It is an arithmetic number, because the mean of its divisors is an integer number (375875775000).

Almost surely, 2^{21311130123013} is an apocalyptic number.

It is an amenable number.

21311130123013 is a deficient number, since it is larger than the sum of its proper divisors (2744919476987).

21311130123013 is a wasteful number, since it uses less digits than its factorization.

21311130123013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2702.

The product of its (nonzero) digits is 324, while the sum is 22.

Adding to 21311130123013 its reverse (31032103111312), we get a palindrome (52343233234325).

The spelling of 21311130123013 in words is "twenty-one trillion, three hundred eleven billion, one hundred thirty million, one hundred twenty-three thousand, thirteen".