20221211011 has 4 divisors (see below), whose sum is σ = 20417533552. Its totient is φ = 20024888472.

The previous prime is 20221210993. The next prime is 20221211033. The reversal of 20221211011 is 11011212202.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11011212202 = 2 ⋅5505606101.

It is a cyclic number.

It is not a de Polignac number, because 20221211011 - 2²³ = 20212822403 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20221210982 and 20221211000.

It is not an unprimeable number, because it can be changed into a prime (20221211071) 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, 98161116 + ... + 98161321.

It is an arithmetic number, because the mean of its divisors is an integer number (5104383388).

Almost surely, 2^20221211011 is an apocalyptic number.

20221211011 is a deficient number, since it is larger than the sum of its proper divisors (196322541).

20221211011 is a wasteful number, since it uses less digits than its factorization.

20221211011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196322540.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 20221211011 its reverse (11011212202), we get a palindrome (31232423213).

The spelling of 20221211011 in words is "twenty billion, two hundred twenty-one million, two hundred eleven thousand, eleven".