20212201220021 has 8 divisors (see below), whose sum is σ = 20314932089760. Its totient is φ = 20109471672528.

The previous prime is 20212201219981. The next prime is 20212201220093. The reversal of 20212201220021 is 12002210221202.

It is a happy number.

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 20212201220021 - 2³⁰ = 20211127478197 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 (20212201223021) 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, 48883970 + ... + 49295708.

It is an arithmetic number, because the mean of its divisors is an integer number (2539366511220).

Almost surely, 2^{20212201220021} is an apocalyptic number.

It is an amenable number.

20212201220021 is a deficient number, since it is larger than the sum of its proper divisors (102730869739).

20212201220021 is a wasteful number, since it uses less digits than its factorization.

20212201220021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 661123.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 20212201220021 its reverse (12002210221202), we get a palindrome (32214411441223).

The spelling of 20212201220021 in words is "twenty trillion, two hundred twelve billion, two hundred one million, two hundred twenty thousand, twenty-one".