21000010222101 has 4 divisors (see below), whose sum is σ = 28000013629472. Its totient is φ = 14000006814732.

The previous prime is 21000010222097. The next prime is 21000010222129. The reversal of 21000010222101 is 10122201000012.

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 not a de Polignac number, because 21000010222101 - 2² = 21000010222097 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21000010222171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3500001703681 + ... + 3500001703686.

It is an arithmetic number, because the mean of its divisors is an integer number (7000003407368).

Almost surely, 2^{21000010222101} is an apocalyptic number.

It is an amenable number.

21000010222101 is a deficient number, since it is larger than the sum of its proper divisors (7000003407371).

21000010222101 is an equidigital number, since it uses as much as digits as its factorization.

21000010222101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7000003407370.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 21000010222101 its reverse (10122201000012), we get a palindrome (31122211222113).

The spelling of 21000010222101 in words is "twenty-one trillion, ten million, two hundred twenty-two thousand, one hundred one".