21002022010201 has 4 divisors (see below), whose sum is σ = 21002529947904. Its totient is φ = 21001514072500.

The previous prime is 21002022010141. The next prime is 21002022010217. The reversal of 21002022010201 is 10201022020012.

It is a happy number.

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-21002022010201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21002026010201) 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, 253906825 + ... + 253989526.

It is an arithmetic number, because the mean of its divisors is an integer number (5250632486976).

Almost surely, 2^{21002022010201} is an apocalyptic number.

It is an amenable number.

21002022010201 is a deficient number, since it is larger than the sum of its proper divisors (507937703).

21002022010201 is an equidigital number, since it uses as much as digits as its factorization.

21002022010201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 507937702.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 21002022010201 its reverse (10201022020012), we get a palindrome (31203044030213).

The spelling of 21002022010201 in words is "twenty-one trillion, two billion, twenty-two million, ten thousand, two hundred one".