20020021100121 has 24 divisors (see below), whose sum is σ = 32196820649664. Its totient is φ = 10837906155360.

The previous prime is 20020021100089. The next prime is 20020021100147. The reversal of 20020021100121 is 12100112002002.

It is not a de Polignac number, because 20020021100121 - 2⁵ = 20020021100089 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20020021100097 and 20020021100106.

It is not an unprimeable number, because it can be changed into a prime (20020021100921) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1320400090 + ... + 1320415251.

It is an arithmetic number, because the mean of its divisors is an integer number (1341534193736).

Almost surely, 2^{20020021100121} is an apocalyptic number.

20020021100121 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

20020021100121 is a deficient number, since it is larger than the sum of its proper divisors (12176799549543).

20020021100121 is a wasteful number, since it uses less digits than its factorization.

20020021100121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2640815389 (or 2640815370 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 20020021100121 its reverse (12100112002002), we get a palindrome (32120133102123).

The spelling of 20020021100121 in words is "twenty trillion, twenty billion, twenty-one million, one hundred thousand, one hundred twenty-one".