30121223100 has 72 divisors (see below), whose sum is σ = 87219469680. Its totient is φ = 8025991680.

The previous prime is 30121223021. The next prime is 30121223113. The reversal of 30121223100 is 132212103.

It is a super-2 number, since 2×30121223100² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 30121223100.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 347754 + ... + 425646.

Almost surely, 2^30121223100 is an apocalyptic number.

30121223100 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

30121223100 is an abundant number, since it is smaller than the sum of its proper divisors (57098246580).

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

30121223100 is a wasteful number, since it uses less digits than its factorization.

30121223100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79199 (or 79192 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 30121223100 its reverse (132212103), we get a palindrome (30253435203).

The spelling of 30121223100 in words is "thirty billion, one hundred twenty-one million, two hundred twenty-three thousand, one hundred".