1200040031 has 2 divisors, whose sum is σ = 1200040032. Its totient is φ = 1200040030.

The previous prime is 1200040003. The next prime is 1200040033. The reversal of 1200040031 is 1300400021.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (1300400021) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1200040031 - 2¹⁴ = 1200023647 is a prime.

It is a super-2 number, since 2×1200040031² = 2880192152004961922, which contains 22 as substring.

Together with 1200040033, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 1200039994 and 1200040021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1200040033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600020015 + 600020016.

It is an arithmetic number, because the mean of its divisors is an integer number (600020016).

Almost surely, 2^1200040031 is an apocalyptic number.

1200040031 is a deficient number, since it is larger than the sum of its proper divisors (1).

1200040031 is an equidigital number, since it uses as much as digits as its factorization.

1200040031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 1200040031 is about 34641.5939442746. The cubic root of 1200040031 is about 1062.6703855193.

Adding to 1200040031 its reverse (1300400021), we get a palindrome (2500440052).

The spelling of 1200040031 in words is "one billion, two hundred million, forty thousand, thirty-one".