20022121011 has 4 divisors (see below), whose sum is σ = 26696161352. Its totient is φ = 13348080672.

The previous prime is 20022120973. The next prime is 20022121013. The reversal of 20022121011 is 11012122002.

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

It is not a de Polignac number, because 20022121011 - 2⁷ = 20022120883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20022121013) 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, 3337020166 + ... + 3337020171.

It is an arithmetic number, because the mean of its divisors is an integer number (6674040338).

Almost surely, 2^20022121011 is an apocalyptic number.

20022121011 is a deficient number, since it is larger than the sum of its proper divisors (6674040341).

20022121011 is an equidigital number, since it uses as much as digits as its factorization.

20022121011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6674040340.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 20022121011 its reverse (11012122002), we get a palindrome (31034243013).

Subtracting from 20022121011 its reverse (11012122002), we obtain a palindrome (9009999009).

It can be divided in two parts, 20022 and 121011, that multiplied together give a palindrome (2422882242).

The spelling of 20022121011 in words is "twenty billion, twenty-two million, one hundred twenty-one thousand, eleven".