1012400311 has 4 divisors (see below), whose sum is σ = 1090277272. Its totient is φ = 934523352.

The previous prime is 1012400297. The next prime is 1012400359. The reversal of 1012400311 is 1130042101.

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 1012400311 - 2⁷ = 1012400183 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13), and also a Moran number because the ratio is a prime number: 77876947 = 1012400311 / (1 + 0 + 1 + 2 + 4 + 0 + 0 + 3 + 1 + 1).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1012400291 and 1012400300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1012404311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38938461 + ... + 38938486.

It is an arithmetic number, because the mean of its divisors is an integer number (272569318).

Almost surely, 2^1012400311 is an apocalyptic number.

1012400311 is a deficient number, since it is larger than the sum of its proper divisors (77876961).

1012400311 is an equidigital number, since it uses as much as digits as its factorization.

1012400311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77876960.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 1012400311 is about 31818.2386533259. The cubic root of 1012400311 is about 1004.1164684360.

Adding to 1012400311 its reverse (1130042101), we get a palindrome (2142442412).

The spelling of 1012400311 in words is "one billion, twelve million, four hundred thousand, three hundred eleven".