211010021010021 has 16 divisors (see below), whose sum is σ = 291115526768640. Its totient is φ = 135810591678960.

The previous prime is 211010021010017. The next prime is 211010021010059. The reversal of 211010021010021 is 120010120010112.

It is not a de Polignac number, because 211010021010021 - 2² = 211010021010017 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 211010021009979 and 211010021010006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211010021010001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2707508715 + ... + 2707586648.

It is an arithmetic number, because the mean of its divisors is an integer number (18194720423040).

Almost surely, 2^{211010021010021} is an apocalyptic number.

It is an amenable number.

211010021010021 is a deficient number, since it is larger than the sum of its proper divisors (80105505758619).

211010021010021 is a wasteful number, since it uses less digits than its factorization.

211010021010021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5415095816.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 211010021010021 its reverse (120010120010112), we get a palindrome (331020141020133).

Subtracting from 211010021010021 its reverse (120010120010112), we obtain a palindrome (90999900999909).

The spelling of 211010021010021 in words is "two hundred eleven trillion, ten billion, twenty-one million, ten thousand, twenty-one".