20020021012097 has 4 divisors (see below), whose sum is σ = 20508314207556. Its totient is φ = 19531727816640.

The previous prime is 20020021012087. The next prime is 20020021012111. The reversal of 20020021012097 is 79021012002002.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2067818116081 + 17952202896016 = 1437991^2 + 4237004^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20020021012097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20020021012087) 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, 244146597668 + ... + 244146597749.

It is an arithmetic number, because the mean of its divisors is an integer number (5127078551889).

Almost surely, 2^{20020021012097} is an apocalyptic number.

It is an amenable number.

20020021012097 is a deficient number, since it is larger than the sum of its proper divisors (488293195459).

20020021012097 is an equidigital number, since it uses as much as digits as its factorization.

20020021012097 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 488293195458.

The product of its (nonzero) digits is 1008, while the sum is 26.

Adding to 20020021012097 its reverse (79021012002002), we get a palindrome (99041033014099).

The spelling of 20020021012097 in words is "twenty trillion, twenty billion, twenty-one million, twelve thousand, ninety-seven".