3997221102 has 128 divisors (see below), whose sum is σ = 10730880000. Its totient is φ = 1077411456.

The previous prime is 3997221091. The next prime is 3997221157. The reversal of 3997221102 is 2011227993.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1930924 + ... + 1932992.

It is an arithmetic number, because the mean of its divisors is an integer number (83835000).

Almost surely, 2^3997221102 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3997221102, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5365440000).

3997221102 is an abundant number, since it is smaller than the sum of its proper divisors (6733658898).

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

3997221102 is a wasteful number, since it uses less digits than its factorization.

3997221102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2375 (or 2369 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 36.

The square root of 3997221102 is about 63223.5802687573. The cubic root of 3997221102 is about 1587.0333646739.

The spelling of 3997221102 in words is "three billion, nine hundred ninety-seven million, two hundred twenty-one thousand, one hundred two".