21214442001 has 32 divisors (see below), whose sum is σ = 31541304960. Its totient is φ = 12604363776.

The previous prime is 21214441981. The next prime is 21214442003. The reversal of 21214442001 is 10024441212.

It is not a de Polignac number, because 21214442001 - 2¹³ = 21214433809 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21214442003) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2745195 + ... + 2752911.

It is an arithmetic number, because the mean of its divisors is an integer number (985665780).

Almost surely, 2^21214442001 is an apocalyptic number.

It is an amenable number.

21214442001 is a deficient number, since it is larger than the sum of its proper divisors (10326862959).

21214442001 is a wasteful number, since it uses less digits than its factorization.

21214442001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10593.

The product of its (nonzero) digits is 512, while the sum is 21.

Adding to 21214442001 its reverse (10024441212), we get a palindrome (31238883213).

The spelling of 21214442001 in words is "twenty-one billion, two hundred fourteen million, four hundred forty-two thousand, one".