21211313001 has 8 divisors (see below), whose sum is σ = 28284645024. Its totient is φ = 14139428160.

The previous prime is 21211312999. The next prime is 21211313003. The reversal of 21211313001 is 10031311212.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (21211312999) and next prime (21211313003).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21211313001 - 2¹ = 21211312999 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21211313003) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 327120 + ... + 386561.

It is an arithmetic number, because the mean of its divisors is an integer number (3535580628).

Almost surely, 2^21211313001 is an apocalyptic number.

It is an amenable number.

21211313001 is a deficient number, since it is larger than the sum of its proper divisors (7073332023).

21211313001 is an equidigital number, since it uses as much as digits as its factorization.

21211313001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 723591.

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 21211313001 its reverse (10031311212), we get a palindrome (31242624213).

The spelling of 21211313001 in words is "twenty-one billion, two hundred eleven million, three hundred thirteen thousand, one".