20211022121021 has 8 divisors (see below), whose sum is σ = 20333501260800. Its totient is φ = 20088661839120.

The previous prime is 20211022120987. The next prime is 20211022121093. The reversal of 20211022121021 is 12012122011202.

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 20211022121021 - 2⁴² = 15812975609917 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20211022121321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29373341 + ... + 30053538.

It is an arithmetic number, because the mean of its divisors is an integer number (2541687657600).

Almost surely, 2^{20211022121021} is an apocalyptic number.

It is an amenable number.

20211022121021 is a deficient number, since it is larger than the sum of its proper divisors (122479139779).

20211022121021 is a wasteful number, since it uses less digits than its factorization.

20211022121021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59428939.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 20211022121021 its reverse (12012122011202), we get a palindrome (32223144132223).

The spelling of 20211022121021 in words is "twenty trillion, two hundred eleven billion, twenty-two million, one hundred twenty-one thousand, twenty-one".