20122020021 has 8 divisors (see below), whose sum is σ = 27094997664. Its totient is φ = 13281861200.

The previous prime is 20122020013. The next prime is 20122020031. The reversal of 20122020021 is 12002022102.

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 20122020021 - 2³ = 20122020013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20122019979 and 20122020006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20122020031) 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, 33204351 + ... + 33204956.

It is an arithmetic number, because the mean of its divisors is an integer number (3386874708).

Almost surely, 2^20122020021 is an apocalyptic number.

It is an amenable number.

20122020021 is a deficient number, since it is larger than the sum of its proper divisors (6972977643).

20122020021 is a wasteful number, since it uses less digits than its factorization.

20122020021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66409411.

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 20122020021 its reverse (12002022102), we get a palindrome (32124042123).

The spelling of 20122020021 in words is "twenty billion, one hundred twenty-two million, twenty thousand, twenty-one".