20122021211 has 4 divisors (see below), whose sum is σ = 20310077592. Its totient is φ = 19933964832.

The previous prime is 20122021169. The next prime is 20122021243. The reversal of 20122021211 is 11212022102.

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

It is a cyclic number.

It is not a de Polignac number, because 20122021211 - 2¹⁴ = 20122004827 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20122021411) 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, 94028030 + ... + 94028243.

It is an arithmetic number, because the mean of its divisors is an integer number (5077519398).

Almost surely, 2^20122021211 is an apocalyptic number.

20122021211 is a deficient number, since it is larger than the sum of its proper divisors (188056381).

20122021211 is a wasteful number, since it uses less digits than its factorization.

20122021211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188056380.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 20122021211 its reverse (11212022102), we get a palindrome (31334043313).

The spelling of 20122021211 in words is "twenty billion, one hundred twenty-two million, twenty-one thousand, two hundred eleven".