20221155311 has 6 divisors (see below), whose sum is σ = 23522568480. Its totient is φ = 17332418796.

The previous prime is 20221155287. The next prime is 20221155319. The reversal of 20221155311 is 11355112202.

It is not a de Polignac number, because 20221155311 - 2⁶ = 20221155247 is a prime.

It is a super-2 number, since 2×20221155311² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20221155319) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 206338271 + ... + 206338368.

It is an arithmetic number, because the mean of its divisors is an integer number (3920428080).

Almost surely, 2^20221155311 is an apocalyptic number.

20221155311 is a deficient number, since it is larger than the sum of its proper divisors (3301413169).

20221155311 is an equidigital number, since it uses as much as digits as its factorization.

20221155311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 412676653 (or 412676646 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 23.

Adding to 20221155311 its reverse (11355112202), we get a palindrome (31576267513).

The spelling of 20221155311 in words is "twenty billion, two hundred twenty-one million, one hundred fifty-five thousand, three hundred eleven".