1224213100 has 36 divisors (see below), whose sum is σ = 2898048888. Its totient is φ = 445168000.

The previous prime is 1224213091. The next prime is 1224213101. The reversal of 1224213100 is 13124221.

It is a super-2 number, since 2×1224213100² = 2997395428423220000, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1224213101) 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, 555361 + ... + 557560.

It is an arithmetic number, because the mean of its divisors is an integer number (80501358).

Almost surely, 2^1224213100 is an apocalyptic number.

1224213100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1224213100 is an abundant number, since it is smaller than the sum of its proper divisors (1673835788).

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

1224213100 is a wasteful number, since it uses less digits than its factorization.

1224213100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1112946 (or 1112939 counting only the distinct ones).

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

The square root of 1224213100 is about 34988.7567655668. The cubic root of 1224213100 is about 1069.7583231506.

Adding to 1224213100 its reverse (13124221), we get a palindrome (1237337321).

It can be divided in two parts, 122421 and 3100, that added together give a palindrome (125521).

The spelling of 1224213100 in words is "one billion, two hundred twenty-four million, two hundred thirteen thousand, one hundred".