1231203212 has 6 divisors (see below), whose sum is σ = 2154605628. Its totient is φ = 615601604.

The previous prime is 1231203137. The next prime is 1231203217. The reversal of 1231203212 is 2123021321.

It is a super-2 number, since 2×1231203212² = 3031722698478233888, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1231203217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 153900398 + ... + 153900405.

It is an arithmetic number, because the mean of its divisors is an integer number (359100938).

Almost surely, 2^1231203212 is an apocalyptic number.

It is an amenable number.

1231203212 is a deficient number, since it is larger than the sum of its proper divisors (923402416).

1231203212 is a wasteful number, since it uses less digits than its factorization.

1231203212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 307800807 (or 307800805 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 1231203212 is about 35088.5054113167. The cubic root of 1231203212 is about 1071.7905246654.

Adding to 1231203212 its reverse (2123021321), we get a palindrome (3354224533).

The spelling of 1231203212 in words is "one billion, two hundred thirty-one million, two hundred three thousand, two hundred twelve".