1212022100 has 36 divisors (see below), whose sum is σ = 2631602400. Its totient is φ = 484529760.

The previous prime is 1212022013. The next prime is 1212022111. The reversal of 1212022100 is 12202121.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 324041 + ... + 327759.

Almost surely, 2^1212022100 is an apocalyptic number.

1212022100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1212022100 is an abundant number, since it is smaller than the sum of its proper divisors (1419580300).

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

1212022100 is a wasteful number, since it uses less digits than its factorization.

1212022100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6992 (or 6985 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 1212022100 is about 34814.1077725683. The cubic root of 1212022100 is about 1066.1955026303.

Adding to 1212022100 its reverse (12202121), we get a palindrome (1224224221).

The spelling of 1212022100 in words is "one billion, two hundred twelve million, twenty-two thousand, one hundred".