1201221988 has 6 divisors (see below), whose sum is σ = 2102138486. Its totient is φ = 600610992.

The previous prime is 1201221961. The next prime is 1201222027. The reversal of 1201221988 is 8891221021.

It can be written as a sum of positive squares in only one way, i.e., 826102564 + 375119424 = 28742^2 + 19368^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 150152745 + ... + 150152752.

Almost surely, 2^1201221988 is an apocalyptic number.

It is an amenable number.

1201221988 is a deficient number, since it is larger than the sum of its proper divisors (900916498).

1201221988 is a wasteful number, since it uses less digits than its factorization.

1201221988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 300305501 (or 300305499 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 34.

The square root of 1201221988 is about 34658.6495409155. The cubic root of 1201221988 is about 1063.0191568175.

The spelling of 1201221988 in words is "one billion, two hundred one million, two hundred twenty-one thousand, nine hundred eighty-eight".