1221233000 has 64 divisors (see below), whose sum is σ = 3077539920. Its totient is φ = 450912000.

The previous prime is 1221232973. The next prime is 1221233017. The reversal of 1221233000 is 3321221.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 26977636 + 1194255364 = 5194^2 + 34558^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33971 + ... + 59970.

Almost surely, 2^1221233000 is an apocalyptic number.

1221233000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1221233000 is an abundant number, since it is smaller than the sum of its proper divisors (1856306920).

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

1221233000 is a wasteful number, since it uses less digits than its factorization.

1221233000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93975 (or 93961 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 1221233000 is about 34946.1442794481. The cubic root of 1221233000 is about 1068.8895808486.

Adding to 1221233000 its reverse (3321221), we get a palindrome (1224554221).

The spelling of 1221233000 in words is "one billion, two hundred twenty-one million, two hundred thirty-three thousand".