21310421001 has 8 divisors (see below), whose sum is σ = 28423105440. Its totient is φ = 14202341952.

The previous prime is 21310420993. The next prime is 21310421021. The reversal of 21310421001 is 10012401312.

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

It is not a de Polignac number, because 21310421001 - 2³ = 21310420993 is a prime.

It is a super-3 number, since 3×21310421001³ (a number of 32 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (21310421021) 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, 1140535 + ... + 1159068.

It is an arithmetic number, because the mean of its divisors is an integer number (3552888180).

Almost surely, 2^21310421001 is an apocalyptic number.

It is an amenable number.

21310421001 is a deficient number, since it is larger than the sum of its proper divisors (7112684439).

21310421001 is a wasteful number, since it uses less digits than its factorization.

21310421001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2302695.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 21310421001 its reverse (10012401312), we get a palindrome (31322822313).

The spelling of 21310421001 in words is "twenty-one billion, three hundred ten million, four hundred twenty-one thousand, one".