20100021202091 has 8 divisors (see below), whose sum is σ = 20568480174000. Its totient is φ = 19631608440192.

The previous prime is 20100021202043. The next prime is 20100021202111. The reversal of 20100021202091 is 19020212000102.

It is a happy number.

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 20100021202091 - 2²⁶ = 20099954093227 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20100024202091) 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, 10671650 + ... + 12413063.

It is an arithmetic number, because the mean of its divisors is an integer number (2571060021750).

Almost surely, 2^{20100021202091} is an apocalyptic number.

20100021202091 is a deficient number, since it is larger than the sum of its proper divisors (468458971909).

20100021202091 is a wasteful number, since it uses less digits than its factorization.

20100021202091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23105005.

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 20100021202091 its reverse (19020212000102), we get a palindrome (39120233202193).

The spelling of 20100021202091 in words is "twenty trillion, one hundred billion, twenty-one million, two hundred two thousand, ninety-one".