1020312203 has 4 divisors (see below), whose sum is σ = 1025439600. Its totient is φ = 1015184808.

The previous prime is 1020312199. The next prime is 1020312211. The reversal of 1020312203 is 3022130201.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3022130201 = 31 ⋅97488071.

It is a cyclic number.

It is not a de Polignac number, because 1020312203 - 2² = 1020312199 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1020312253) 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, 2563400 + ... + 2563797.

It is an arithmetic number, because the mean of its divisors is an integer number (256359900).

Almost surely, 2^1020312203 is an apocalyptic number.

1020312203 is a deficient number, since it is larger than the sum of its proper divisors (5127397).

1020312203 is an equidigital number, since it uses as much as digits as its factorization.

1020312203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5127396.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 1020312203 is about 31942.3261989480. The cubic root of 1020312203 is about 1006.7254019036.

Adding to 1020312203 its reverse (3022130201), we get a palindrome (4042442404).

The spelling of 1020312203 in words is "one billion, twenty million, three hundred twelve thousand, two hundred three".