20211122021201 has 4 divisors (see below), whose sum is σ = 20335116634992. Its totient is φ = 20087127407412.

The previous prime is 20211122021197. The next prime is 20211122021291. The reversal of 20211122021201 is 10212022111202.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20211122021201 - 2² = 20211122021197 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20211122021201.

It is not an unprimeable number, because it can be changed into a prime (20211122021291) 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, 61997306651 + ... + 61997306976.

It is an arithmetic number, because the mean of its divisors is an integer number (5083779158748).

Almost surely, 2^{20211122021201} is an apocalyptic number.

It is an amenable number.

20211122021201 is a deficient number, since it is larger than the sum of its proper divisors (123994613791).

20211122021201 is a wasteful number, since it uses less digits than its factorization.

20211122021201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123994613790.

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

Adding to 20211122021201 its reverse (10212022111202), we get a palindrome (30423144132403).

Subtracting from 20211122021201 its reverse (10212022111202), we obtain a palindrome (9999099909999).

The spelling of 20211122021201 in words is "twenty trillion, two hundred eleven billion, one hundred twenty-two million, twenty-one thousand, two hundred one".