21021002131201 has 8 divisors (see below), whose sum is σ = 21223039643424. Its totient is φ = 20819067944160.

The previous prime is 21021002131141. The next prime is 21021002131243. The reversal of 21021002131201 is 10213120012012.

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

It is a cyclic number.

It is not a de Polignac number, because 21021002131201 - 2²¹ = 21021000034049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21021002131271) 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, 25422420 + ... + 26236261.

It is an arithmetic number, because the mean of its divisors is an integer number (2652879955428).

Almost surely, 2^{21021002131201} is an apocalyptic number.

It is an amenable number.

21021002131201 is a deficient number, since it is larger than the sum of its proper divisors (202037512223).

21021002131201 is a wasteful number, since it uses less digits than its factorization.

21021002131201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51662591.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 21021002131201 its reverse (10213120012012), we get a palindrome (31234122143213).

The spelling of 21021002131201 in words is "twenty-one trillion, twenty-one billion, two million, one hundred thirty-one thousand, two hundred one".