1201220988 has 24 divisors (see below), whose sum is σ = 3057653760. Its totient is φ = 364006320.

The previous prime is 1201220987. The next prime is 1201221011. The reversal of 1201220988 is 8890221021.

It is a super-2 number, since 2×1201220988² = 2885863724023392288, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201220981) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 4549948 + ... + 4550211.

It is an arithmetic number, because the mean of its divisors is an integer number (127402240).

Almost surely, 2^1201220988 is an apocalyptic number.

It is an amenable number.

1201220988 is an abundant number, since it is smaller than the sum of its proper divisors (1856432772).

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

1201220988 is a wasteful number, since it uses less digits than its factorization.

1201220988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9100177 (or 9100175 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 33.

The square root of 1201220988 is about 34658.6351144992. The cubic root of 1201220988 is about 1063.0188618347.

Adding to 1201220988 its sum of digits (33), we get a palindrome (1201221021).

The spelling of 1201220988 in words is "one billion, two hundred one million, two hundred twenty thousand, nine hundred eighty-eight".