1012311212203 has 4 divisors (see below), whose sum is σ = 1031411423808. Its totient is φ = 993211000600.

The previous prime is 1012311212197. The next prime is 1012311212219. The reversal of 1012311212203 is 3022121132101.

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

It is a de Polignac number, because none of the positive numbers 2^k-1012311212203 is a prime.

It is a super-2 number, since 2×1012311212203² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1012311212903) 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, 9550105723 + ... + 9550105828.

It is an arithmetic number, because the mean of its divisors is an integer number (257852855952).

Almost surely, 2^{1012311212203} is an apocalyptic number.

1012311212203 is a deficient number, since it is larger than the sum of its proper divisors (19100211605).

1012311212203 is an equidigital number, since it uses as much as digits as its factorization.

1012311212203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19100211604.

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

Adding to 1012311212203 its reverse (3022121132101), we get a palindrome (4034432344304).

The spelling of 1012311212203 in words is "one trillion, twelve billion, three hundred eleven million, two hundred twelve thousand, two hundred three".