1213203100 has 36 divisors (see below), whose sum is σ = 2637798184. Its totient is φ = 484332480.

The previous prime is 1213203091. The next prime is 1213203119. The reversal of 1213203100 is 13023121.

It is a super-2 number, since 2×1213203100² = 2943723523699220000, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 40702 + ... + 63898.

Almost surely, 2^1213203100 is an apocalyptic number.

1213203100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1213203100 is an abundant number, since it is smaller than the sum of its proper divisors (1424595084).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1213203100 is a wasteful number, since it uses less digits than its factorization.

1213203100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23734 (or 23727 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 1213203100 is about 34831.0651574137. The cubic root of 1213203100 is about 1066.5416921723.

Adding to 1213203100 its reverse (13023121), we get a palindrome (1226226221).

The spelling of 1213203100 in words is "one billion, two hundred thirteen million, two hundred three thousand, one hundred".