211002210200021 has 4 divisors (see below), whose sum is σ = 211639679113344. Its totient is φ = 210364741286700.

The previous prime is 211002210199993. The next prime is 211002210200057. The reversal of 211002210200021 is 120002012200112.

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 not a de Polignac number, because 211002210200021 - 2³⁸ = 210727332293077 is a prime.

It is a super-2 number, since 2×211002210200021² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 211002210199969 and 211002210200005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211002210203021) 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, 318734456165 + ... + 318734456826.

It is an arithmetic number, because the mean of its divisors is an integer number (52909919778336).

Almost surely, 2^{211002210200021} is an apocalyptic number.

It is an amenable number.

211002210200021 is a deficient number, since it is larger than the sum of its proper divisors (637468913323).

211002210200021 is an equidigital number, since it uses as much as digits as its factorization.

211002210200021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 637468913322.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 211002210200021 its reverse (120002012200112), we get a palindrome (331004222400133).

The spelling of 211002210200021 in words is "two hundred eleven trillion, two billion, two hundred ten million, two hundred thousand, twenty-one".