20212211231123 has 4 divisors (see below), whose sum is σ = 20212294340160. Its totient is φ = 20212128122088.

The previous prime is 20212211231077. The next prime is 20212211231153. The reversal of 20212211231123 is 32113211221202.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20212211231123 - 2¹⁸ = 20212210968979 is a prime.

It is a super-2 number, since 2×20212211231123² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20212211231153) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41188643 + ... + 41676476.

It is an arithmetic number, because the mean of its divisors is an integer number (5053073585040).

Almost surely, 2^{20212211231123} is an apocalyptic number.

20212211231123 is a deficient number, since it is larger than the sum of its proper divisors (83109037).

20212211231123 is an equidigital number, since it uses as much as digits as its factorization.

20212211231123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83109036.

The product of its (nonzero) digits is 576, while the sum is 23.

Adding to 20212211231123 its reverse (32113211221202), we get a palindrome (52325422452325).

The spelling of 20212211231123 in words is "twenty trillion, two hundred twelve billion, two hundred eleven million, two hundred thirty-one thousand, one hundred twenty-three".