20112021269 has 2 divisors, whose sum is σ = 20112021270. Its totient is φ = 20112021268.

The previous prime is 20112021253. The next prime is 20112021277. The reversal of 20112021269 is 96212021102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17190618769 + 2921402500 = 131113^2 + 54050^2 .

It is a cyclic number.

It is not a de Polignac number, because 20112021269 - 2⁴ = 20112021253 is a prime.

It is a super-2 number, since 2×20112021269² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20112041269) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10056010634 + 10056010635.

It is an arithmetic number, because the mean of its divisors is an integer number (10056010635).

Almost surely, 2^20112021269 is an apocalyptic number.

It is an amenable number.

20112021269 is a deficient number, since it is larger than the sum of its proper divisors (1).

20112021269 is an equidigital number, since it uses as much as digits as its factorization.

20112021269 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 26.

The spelling of 20112021269 in words is "twenty billion, one hundred twelve million, twenty-one thousand, two hundred sixty-nine".