1231220350 has 12 divisors (see below), whose sum is σ = 2290069944. Its totient is φ = 492488120.

The previous prime is 1231220303. The next prime is 1231220351. The reversal of 1231220350 is 530221321.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231220351) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12312154 + ... + 12312253.

It is an arithmetic number, because the mean of its divisors is an integer number (190839162).

Almost surely, 2^1231220350 is an apocalyptic number.

1231220350 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1231220350 is a deficient number, since it is larger than the sum of its proper divisors (1058849594).

1231220350 is a wasteful number, since it uses less digits than its factorization.

1231220350 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24624419 (or 24624414 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 1231220350 is about 35088.7496214955. The cubic root of 1231220350 is about 1071.7954976492.

Adding to 1231220350 its reverse (530221321), we get a palindrome (1761441671).

The spelling of 1231220350 in words is "one billion, two hundred thirty-one million, two hundred twenty thousand, three hundred fifty".