20100010201021 has 4 divisors (see below), whose sum is σ = 20295155931232. Its totient is φ = 19904864470812.

The previous prime is 20100010200929. The next prime is 20100010201099. The reversal of 20100010201021 is 12010201000102.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20100010201021 - 2²⁹ = 20099473330109 is a prime.

It is a super-2 number, since 2×20100010201021² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20100010200989 and 20100010201007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20100010201721) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 97572864951 + ... + 97572865156.

It is an arithmetic number, because the mean of its divisors is an integer number (5073788982808).

Almost surely, 2^{20100010201021} is an apocalyptic number.

It is an amenable number.

20100010201021 is a deficient number, since it is larger than the sum of its proper divisors (195145730211).

20100010201021 is a wasteful number, since it uses less digits than its factorization.

20100010201021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195145730210.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 20100010201021 its reverse (12010201000102), we get a palindrome (32110211201123).

The spelling of 20100010201021 in words is "twenty trillion, one hundred billion, ten million, two hundred one thousand, twenty-one".