21020311210113 has 16 divisors (see below), whose sum is σ = 31142778315840. Its totient is φ = 14012831371392.

The previous prime is 21020311210091. The next prime is 21020311210187. The reversal of 21020311210113 is 31101211302012.

21020311210113 is a `hidden beast` number, since 2 + 10 + 20 + 311 + 210 + 113 = 666.

It is not a de Polignac number, because 21020311210113 - 2¹³ = 21020311201921 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21020311210013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19163056 + ... + 20230257.

It is an arithmetic number, because the mean of its divisors is an integer number (1946423644740).

Almost surely, 2^{21020311210113} is an apocalyptic number.

It is an amenable number.

21020311210113 is a deficient number, since it is larger than the sum of its proper divisors (10122467105727).

21020311210113 is a wasteful number, since it uses less digits than its factorization.

21020311210113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39413085 (or 39413079 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 21020311210113 its reverse (31101211302012), we get a palindrome (52121522512125).

The spelling of 21020311210113 in words is "twenty-one trillion, twenty billion, three hundred eleven million, two hundred ten thousand, one hundred thirteen".