21301222001 has 4 divisors (see below), whose sum is σ = 22227362112. Its totient is φ = 20375081892.

The previous prime is 21301221979. The next prime is 21301222027. The reversal of 21301222001 is 10022210312.

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 not a de Polignac number, because 21301222001 - 2¹⁴ = 21301205617 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21301222081) 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, 463070021 + ... + 463070066.

It is an arithmetic number, because the mean of its divisors is an integer number (5556840528).

Almost surely, 2^21301222001 is an apocalyptic number.

It is an amenable number.

21301222001 is a deficient number, since it is larger than the sum of its proper divisors (926140111).

21301222001 is an equidigital number, since it uses as much as digits as its factorization.

21301222001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 926140110.

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 21301222001 its reverse (10022210312), we get a palindrome (31323432313).

The spelling of 21301222001 in words is "twenty-one billion, three hundred one million, two hundred twenty-two thousand, one".