21210101102131 has 2 divisors, whose sum is σ = 21210101102132. Its totient is φ = 21210101102130.

The previous prime is 21210101102087. The next prime is 21210101102231. The reversal of 21210101102131 is 13120110101212.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21210101102131 - 2¹³ = 21210101093939 is a prime.

It is a super-2 number, since 2×21210101102131² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21210101102231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10605050551065 + 10605050551066.

It is an arithmetic number, because the mean of its divisors is an integer number (10605050551066).

Almost surely, 2^{21210101102131} is an apocalyptic number.

21210101102131 is a deficient number, since it is larger than the sum of its proper divisors (1).

21210101102131 is an equidigital number, since it uses as much as digits as its factorization.

21210101102131 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24, while the sum is 16.

Adding to 21210101102131 its reverse (13120110101212), we get a palindrome (34330211203343).

The spelling of 21210101102131 in words is "twenty-one trillion, two hundred ten billion, one hundred one million, one hundred two thousand, one hundred thirty-one".