20000021001121 has 16 divisors (see below), whose sum is σ = 23243345510400. Its totient is φ = 16855057045008.

The previous prime is 20000021001113. The next prime is 20000021001131. The reversal of 20000021001121 is 12110012000002.

It is not a de Polignac number, because 20000021001121 - 2³ = 20000021001113 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20000021001098 and 20000021001107.

It is not an unprimeable number, because it can be changed into a prime (20000021001131) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 75529765 + ... + 75794098.

It is an arithmetic number, because the mean of its divisors is an integer number (1452709094400).

Almost surely, 2^{20000021001121} is an apocalyptic number.

It is an amenable number.

20000021001121 is a deficient number, since it is larger than the sum of its proper divisors (3243324509279).

20000021001121 is a wasteful number, since it uses less digits than its factorization.

20000021001121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151324188.

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

Adding to 20000021001121 its reverse (12110012000002), we get a palindrome (32110033001123).

The spelling of 20000021001121 in words is "twenty trillion, twenty-one million, one thousand, one hundred twenty-one".