30621150121 has 3 divisors (see below), whose sum is σ = 30621325111. Its totient is φ = 30620975132.

The previous prime is 30621150071. The next prime is 30621150127. The reversal of 30621150121 is 12105112603.

It is a happy number.

The square root of 30621150121 is 174989.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 25988986521 + 4632163600 = 161211^2 + 68060^2 .

It is not a de Polignac number, because 30621150121 - 2¹¹ = 30621148073 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30621150092 and 30621150101.

It is not an unprimeable number, because it can be changed into a prime (30621150127) 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 2 ways as a sum of consecutive naturals, for example, 87495 + ... + 262483.

Almost surely, 2^30621150121 is an apocalyptic number.

30621150121 is the 174989-th square number.

30621150121 is the 87495-th centered octagonal number.

It is an amenable number.

30621150121 is a deficient number, since it is larger than the sum of its proper divisors (174990).

30621150121 is an frugal number, since it uses more digits than its factorization.

30621150121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 349978 (or 174989 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 22.

Adding to 30621150121 its reverse (12105112603), we get a palindrome (42726262724).

The spelling of 30621150121 in words is "thirty billion, six hundred twenty-one million, one hundred fifty thousand, one hundred twenty-one".