20211121120031 has 2 divisors, whose sum is σ = 20211121120032. Its totient is φ = 20211121120030.

The previous prime is 20211121119997. The next prime is 20211121120063. The reversal of 20211121120031 is 13002112111202.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20211121120031 - 2¹⁴ = 20211121103647 is a prime.

It is a super-2 number, since 2×20211121120031² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20211121119991 and 20211121120009.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20211121120081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10105560560015 + 10105560560016.

It is an arithmetic number, because the mean of its divisors is an integer number (10105560560016).

Almost surely, 2^{20211121120031} is an apocalyptic number.

20211121120031 is a deficient number, since it is larger than the sum of its proper divisors (1).

20211121120031 is an equidigital number, since it uses as much as digits as its factorization.

20211121120031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 20211121120031 its reverse (13002112111202), we get a palindrome (33213233231233).

The spelling of 20211121120031 in words is "twenty trillion, two hundred eleven billion, one hundred twenty-one million, one hundred twenty thousand, thirty-one".