1002120031123 has 4 divisors (see below), whose sum is σ = 1006278205768. Its totient is φ = 997961856480.

The previous prime is 1002120031109. The next prime is 1002120031169. The reversal of 1002120031123 is 3211300212001.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1002120031123 is a prime.

It is a super-2 number, since 2×1002120031123² (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 = 1002120031097 and 1002120031106.

It is not an unprimeable number, because it can be changed into a prime (1002120031183) 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, 2079086961 + ... + 2079087442.

It is an arithmetic number, because the mean of its divisors is an integer number (251569551442).

Almost surely, 2^{1002120031123} is an apocalyptic number.

1002120031123 is a deficient number, since it is larger than the sum of its proper divisors (4158174645).

1002120031123 is an equidigital number, since it uses as much as digits as its factorization.

1002120031123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4158174644.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 1002120031123 its reverse (3211300212001), we get a palindrome (4213420243124).

The spelling of 1002120031123 in words is "one trillion, two billion, one hundred twenty million, thirty-one thousand, one hundred twenty-three".