211010102021 has 4 divisors (see below), whose sum is σ = 211012821600. Its totient is φ = 211007382444.

The previous prime is 211010102011. The next prime is 211010102027. The reversal of 211010102021 is 120201010112.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-211010102021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 211010101993 and 211010102011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211010102027) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1239881 + ... + 1399758.

It is an arithmetic number, because the mean of its divisors is an integer number (52753205400).

Almost surely, 2^211010102021 is an apocalyptic number.

It is an amenable number.

211010102021 is a deficient number, since it is larger than the sum of its proper divisors (2719579).

211010102021 is an equidigital number, since it uses as much as digits as its factorization.

211010102021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2719578.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 211010102021 its reverse (120201010112), we get a palindrome (331211112133).

The spelling of 211010102021 in words is "two hundred eleven billion, ten million, one hundred two thousand, twenty-one".