1221000152 has 16 divisors (see below), whose sum is σ = 2299204440. Its totient is φ = 607878976.

The previous prime is 1221000139. The next prime is 1221000181. The reversal of 1221000152 is 2510001221.

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 3 ways as a sum of consecutive naturals, for example, 325658 + ... + 329385.

Almost surely, 2^1221000152 is an apocalyptic number.

It is an amenable number.

1221000152 is a deficient number, since it is larger than the sum of its proper divisors (1078204288).

1221000152 is a wasteful number, since it uses less digits than its factorization.

1221000152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 655282 (or 655278 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 14.

The square root of 1221000152 is about 34942.8125942947. The cubic root of 1221000152 is about 1068.8216427835.

Adding to 1221000152 its reverse (2510001221), we get a palindrome (3731001373).

The spelling of 1221000152 in words is "one billion, two hundred twenty-one million, one hundred fifty-two", and thus it is an aban number.