20201021213001 has 12 divisors (see below), whose sum is σ = 27263119187568. Its totient is φ = 13305090263224.

The previous prime is 20201021212993. The next prime is 20201021213003. The reversal of 20201021213001 is 10031212010202.

It is not a de Polignac number, because 20201021213001 - 2³ = 20201021212993 is a prime.

It is a super-2 number, since 2×20201021213001² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20201021213003) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 488705835 + ... + 488747168.

It is an arithmetic number, because the mean of its divisors is an integer number (2271926598964).

Almost surely, 2^{20201021213001} is an apocalyptic number.

It is an amenable number.

20201021213001 is a deficient number, since it is larger than the sum of its proper divisors (7062097974567).

20201021213001 is an frugal number, since it uses more digits than its factorization.

20201021213001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 977453172 (or 977453089 counting only the distinct ones).

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

Adding to 20201021213001 its reverse (10031212010202), we get a palindrome (30232233223203).

The spelling of 20201021213001 in words is "twenty trillion, two hundred one billion, twenty-one million, two hundred thirteen thousand, one".