30708707121 has 15 divisors (see below), whose sum is σ = 45875856873. Its totient is φ = 20471419980.

The previous prime is 30708707119. The next prime is 30708707149. The reversal of 30708707121 is 12170780703.

It is a happy number.

The square root of 30708707121 is 175239.

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

It is not a de Polignac number, because 30708707121 - 2¹ = 30708707119 is a prime.

It is a super-2 number, since 2×30708707121² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (30708707321) by changing a digit.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 1567416 + ... + 1586886.

Almost surely, 2^30708707121 is an apocalyptic number.

30708707121 is the 175239-th square number.

30708707121 is the 87620-th centered octagonal number.

It is an amenable number.

30708707121 is a deficient number, since it is larger than the sum of its proper divisors (15167149752).

30708707121 is an frugal number, since it uses more digits than its factorization.

30708707121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38954 (or 19474 counting only the distinct ones).

The product of its (nonzero) digits is 16464, while the sum is 36.

Multiplying 30708707121 by its sum of digits (36), we get a square (1105513456356 = 1051434²).

The spelling of 30708707121 in words is "thirty billion, seven hundred eight million, seven hundred seven thousand, one hundred twenty-one".