21010212131201 has 8 divisors (see below), whose sum is σ = 21013884192000. Its totient is φ = 21006540403920.

The previous prime is 21010212131179. The next prime is 21010212131263. The reversal of 21010212131201 is 10213121201012.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21010212131201 - 2³⁸ = 20735334224257 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21010212131201.

It is not an unprimeable number, because it can be changed into a prime (21010212139201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 147960206 + ... + 148102136.

It is an arithmetic number, because the mean of its divisors is an integer number (2626735524000).

Almost surely, 2^{21010212131201} is an apocalyptic number.

It is an amenable number.

21010212131201 is a deficient number, since it is larger than the sum of its proper divisors (3672060799).

21010212131201 is a wasteful number, since it uses less digits than its factorization.

21010212131201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166759.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 21010212131201 its reverse (10213121201012), we get a palindrome (31223333332213).

The spelling of 21010212131201 in words is "twenty-one trillion, ten billion, two hundred twelve million, one hundred thirty-one thousand, two hundred one".