10101210010021 has 8 divisors (see below), whose sum is σ = 10878300609624. Its totient is φ = 9324130045440.

The previous prime is 10101210010019. The next prime is 10101210010043. The reversal of 10101210010021 is 12001001210101.

It can be written as a sum of positive squares in 4 ways, for example, as 44611776225 + 10056598233796 = 211215^2 + 3171214^2 .

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 10101210010021 - 2¹ = 10101210010019 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 (10101210010081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 628660 + ... + 4538461.

It is an arithmetic number, because the mean of its divisors is an integer number (1359787576203).

Almost surely, 2^{10101210010021} is an apocalyptic number.

It is an amenable number.

10101210010021 is a deficient number, since it is larger than the sum of its proper divisors (777090599603).

10101210010021 is a wasteful number, since it uses less digits than its factorization.

10101210010021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5317511.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 10101210010021 its reverse (12001001210101), we get a palindrome (22102211220122).

The spelling of 10101210010021 in words is "ten trillion, one hundred one billion, two hundred ten million, ten thousand, twenty-one".