1212213400 has 24 divisors (see below), whose sum is σ = 2818396620. Its totient is φ = 484885280.

The previous prime is 1212213361. The next prime is 1212213437. The reversal of 1212213400 is 43122121.

1212213400 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×1212213400² = 2938922654279120000, 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 5 ways as a sum of consecutive naturals, for example, 3030334 + ... + 3030733.

Almost surely, 2^1212213400 is an apocalyptic number.

1212213400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1212213400 is an abundant number, since it is smaller than the sum of its proper divisors (1606183220).

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

1212213400 is a wasteful number, since it uses less digits than its factorization.

1212213400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6061083 (or 6061074 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 1212213400 is about 34816.8551135797. The cubic root of 1212213400 is about 1066.2515941459.

Adding to 1212213400 its reverse (43122121), we get a palindrome (1255335521).

The spelling of 1212213400 in words is "one billion, two hundred twelve million, two hundred thirteen thousand, four hundred".