211010201010021 has 16 divisors (see below), whose sum is σ = 338462477811200. Its totient is φ = 114231086260848.

The previous prime is 211010201009957. The next prime is 211010201010029. The reversal of 211010201010021 is 120010102010112.

It is not a de Polignac number, because 211010201010021 - 2⁶ = 211010201009957 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 211010201009979 and 211010201010006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211010201010029) 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, 264423810391 + ... + 264423811188.

It is an arithmetic number, because the mean of its divisors is an integer number (21153904863200).

Almost surely, 2^{211010201010021} is an apocalyptic number.

211010201010021 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

211010201010021 is a deficient number, since it is larger than the sum of its proper divisors (127452276801179).

211010201010021 is a wasteful number, since it uses less digits than its factorization.

211010201010021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 528847621608.

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

Adding to 211010201010021 its reverse (120010102010112), we get a palindrome (331020303020133).

The spelling of 211010201010021 in words is "two hundred eleven trillion, ten billion, two hundred one million, ten thousand, twenty-one".