1001122123231 has 4 divisors (see below), whose sum is σ = 1001125556464. Its totient is φ = 1001118690000.

The previous prime is 1001122123171. The next prime is 1001122123277. The reversal of 1001122123231 is 1323212211001.

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 1001122123231 - 2⁹ = 1001122122719 is a prime.

It is a super-2 number, since 2×1001122123231² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1001122123199 and 1001122123208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1001122123031) 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, 1233990 + ... + 1877491.

It is an arithmetic number, because the mean of its divisors is an integer number (250281389116).

Almost surely, 2^{1001122123231} is an apocalyptic number.

1001122123231 is a deficient number, since it is larger than the sum of its proper divisors (3433233).

1001122123231 is an equidigital number, since it uses as much as digits as its factorization.

1001122123231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3433232.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 1001122123231 its reverse (1323212211001), we get a palindrome (2324334334232).

The spelling of 1001122123231 in words is "one trillion, one billion, one hundred twenty-two million, one hundred twenty-three thousand, two hundred thirty-one".