1213202231 has 12 divisors (see below), whose sum is σ = 1285244064. Its totient is φ = 1145016000.

The previous prime is 1213202219. The next prime is 1213202251. The reversal of 1213202231 is 1322023121.

It is a de Polignac number, because none of the positive numbers 2^k-1213202231 is a prime.

It is a super-2 number, since 2×1213202231² = 2943719306606754722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213202201) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 91631 + ... + 104031.

It is an arithmetic number, because the mean of its divisors is an integer number (107103672).

Almost surely, 2^1213202231 is an apocalyptic number.

1213202231 is a deficient number, since it is larger than the sum of its proper divisors (72041833).

1213202231 is a wasteful number, since it uses less digits than its factorization.

1213202231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12710 (or 12691 counting only the distinct ones).

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

The square root of 1213202231 is about 34831.0526829150. The cubic root of 1213202231 is about 1066.5414375228.

Adding to 1213202231 its reverse (1322023121), we get a palindrome (2535225352).

The spelling of 1213202231 in words is "one billion, two hundred thirteen million, two hundred two thousand, two hundred thirty-one".