1000012123031 has 4 divisors (see below), whose sum is σ = 1000173135864. Its totient is φ = 999851110200.

The previous prime is 1000012123009. The next prime is 1000012123039. The reversal of 1000012123031 is 1303212100001.

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-1000012123031 is a prime.

It is a super-2 number, since 2×1000012123031² (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 = 1000012122997 and 1000012123015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1000012123039) 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, 80497100 + ... + 80509521.

It is an arithmetic number, because the mean of its divisors is an integer number (250043283966).

Almost surely, 2^{1000012123031} is an apocalyptic number.

1000012123031 is a deficient number, since it is larger than the sum of its proper divisors (161012833).

1000012123031 is an equidigital number, since it uses as much as digits as its factorization.

1000012123031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161012832.

The product of its (nonzero) digits is 36, while the sum is 14.

Adding to 1000012123031 its reverse (1303212100001), we get a palindrome (2303224223032).

The spelling of 1000012123031 in words is "one trillion, twelve million, one hundred twenty-three thousand, thirty-one".