20211121100239 has 2 divisors, whose sum is σ = 20211121100240. Its totient is φ = 20211121100238.

The previous prime is 20211121100153. The next prime is 20211121100273. The reversal of 20211121100239 is 93200112111202.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20211121100239 - 2¹³ = 20211121092047 is a prime.

It is a super-2 number, since 2×20211121100239² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20211121100539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10105560550119 + 10105560550120.

It is an arithmetic number, because the mean of its divisors is an integer number (10105560550120).

Almost surely, 2^{20211121100239} is an apocalyptic number.

20211121100239 is a deficient number, since it is larger than the sum of its proper divisors (1).

20211121100239 is an equidigital number, since it uses as much as digits as its factorization.

20211121100239 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 25.

The spelling of 20211121100239 in words is "twenty trillion, two hundred eleven billion, one hundred twenty-one million, one hundred thousand, two hundred thirty-nine".