1021201888 has 48 divisors (see below), whose sum is σ = 2299860864. Its totient is φ = 437247360.

The previous prime is 1021201877. The next prime is 1021201889. The reversal of 1021201888 is 8881021201.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021201889) 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, 449331 + ... + 451597.

It is an arithmetic number, because the mean of its divisors is an integer number (47913768).

Almost surely, 2^1021201888 is an apocalyptic number.

It is an amenable number.

1021201888 is an abundant number, since it is smaller than the sum of its proper divisors (1278658976).

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

1021201888 is a wasteful number, since it uses less digits than its factorization.

1021201888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4295 (or 4287 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 31.

The square root of 1021201888 is about 31956.2495922159. The cubic root of 1021201888 is about 1007.0179294521.

The spelling of 1021201888 in words is "one billion, twenty-one million, two hundred one thousand, eight hundred eighty-eight".