21010131101 has 2 divisors, whose sum is σ = 21010131102. Its totient is φ = 21010131100.

The previous prime is 21010131083. The next prime is 21010131113. The reversal of 21010131101 is 10113101012.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20923622500 + 86508601 = 144650^2 + 9301^2 .

It is a cyclic number.

It is not a de Polignac number, because 21010131101 - 2³⁴ = 3830261917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21010131161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10505065550 + 10505065551.

It is an arithmetic number, because the mean of its divisors is an integer number (10505065551).

Almost surely, 2^21010131101 is an apocalyptic number.

It is an amenable number.

21010131101 is a deficient number, since it is larger than the sum of its proper divisors (1).

21010131101 is an equidigital number, since it uses as much as digits as its factorization.

21010131101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6, while the sum is 11.

Adding to 21010131101 its reverse (10113101012), we get a palindrome (31123232113).

The spelling of 21010131101 in words is "twenty-one billion, ten million, one hundred thirty-one thousand, one hundred one".