21010010210101 has 32 divisors (see below), whose sum is σ = 24474478989312. Its totient is φ = 17843426314560.

The previous prime is 21010010210089. The next prime is 21010010210113. The reversal of 21010010210101 is 10101201001012.

It is an interprime number because it is at equal distance from previous prime (21010010210089) and next prime (21010010210113).

It is not a de Polignac number, because 21010010210101 - 2¹⁵ = 21010010177333 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21010010210201) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 172077391 + ... + 172199443.

It is an arithmetic number, because the mean of its divisors is an integer number (764827468416).

Almost surely, 2^{21010010210101} is an apocalyptic number.

It is an amenable number.

21010010210101 is a deficient number, since it is larger than the sum of its proper divisors (3464468779211).

21010010210101 is a wasteful number, since it uses less digits than its factorization.

21010010210101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137953.

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

Adding to 21010010210101 its reverse (10101201001012), we get a palindrome (31111211211113).

The spelling of 21010010210101 in words is "twenty-one trillion, ten billion, ten million, two hundred ten thousand, one hundred one".