21031402001 has 8 divisors (see below), whose sum is σ = 21272928000. Its totient is φ = 20791214640.

The previous prime is 21031401961. The next prime is 21031402037. The reversal of 21031402001 is 10020413012.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21031402001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21031002001) 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, 303041 + ... + 365918.

It is an arithmetic number, because the mean of its divisors is an integer number (2659116000).

Almost surely, 2^21031402001 is an apocalyptic number.

It is an amenable number.

21031402001 is a deficient number, since it is larger than the sum of its proper divisors (241525999).

21031402001 is a wasteful number, since it uses less digits than its factorization.

21031402001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 669319.

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

Adding to 21031402001 its reverse (10020413012), we get a palindrome (31051815013).

The spelling of 21031402001 in words is "twenty-one billion, thirty-one million, four hundred two thousand, one".