1221514000 has 80 divisors (see below), whose sum is σ = 3375605376. Its totient is φ = 418800000.

The previous prime is 1221513991. The next prime is 1221514027. The reversal of 1221514000 is 4151221.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (16).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29626 + ... + 57625.

Almost surely, 2^1221514000 is an apocalyptic number.

1221514000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1221514000 is an abundant number, since it is smaller than the sum of its proper divisors (2154091376).

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

1221514000 is an equidigital number, since it uses as much as digits as its factorization.

1221514000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87281 (or 87265 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 16.

The square root of 1221514000 is about 34950.1645203567. The cubic root of 1221514000 is about 1068.9715567255.

Adding to 1221514000 its reverse (4151221), we get a palindrome (1225665221).

The spelling of 1221514000 in words is "one billion, two hundred twenty-one million, five hundred fourteen thousand".