20221201091 has 32 divisors (see below), whose sum is σ = 25108272000. Its totient is φ = 15857832960.

The previous prime is 20221201081. The next prime is 20221201129. The reversal of 20221201091 is 19010212202.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 20221201091 - 2¹⁰ = 20221200067 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20221201031) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7713761 + ... + 7716381.

It is an arithmetic number, because the mean of its divisors is an integer number (784633500).

Almost surely, 2^20221201091 is an apocalyptic number.

20221201091 is a deficient number, since it is larger than the sum of its proper divisors (4887070909).

20221201091 is a wasteful number, since it uses less digits than its factorization.

20221201091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3359.

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 20221201091 its reverse (19010212202), we get a palindrome (39231413293).

The spelling of 20221201091 in words is "twenty billion, two hundred twenty-one million, two hundred one thousand, ninety-one".