9962121228 has 12 divisors (see below), whose sum is σ = 23244949560. Its totient is φ = 3320707072.

The previous prime is 9962121133. The next prime is 9962121241. The reversal of 9962121228 is 8221212699.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×9962121228² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 9962121228.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 415088373 + ... + 415088396.

It is an arithmetic number, because the mean of its divisors is an integer number (1937079130).

Almost surely, 2^9962121228 is an apocalyptic number.

It is an amenable number.

9962121228 is an abundant number, since it is smaller than the sum of its proper divisors (13282828332).

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

9962121228 is a wasteful number, since it uses less digits than its factorization.

9962121228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 830176776 (or 830176774 counting only the distinct ones).

The product of its digits is 62208, while the sum is 42.

The square root of 9962121228 is about 99810.4264493445. The cubic root of 9962121228 is about 2151.7110034544.

The spelling of 9962121228 in words is "nine billion, nine hundred sixty-two million, one hundred twenty-one thousand, two hundred twenty-eight".