30121280380 has 48 divisors (see below), whose sum is σ = 63546547680. Its totient is φ = 11993004288.

The previous prime is 30121280377. The next prime is 30121280381. The reversal of 30121280380 is 8308212103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30121280381) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9106687 + ... + 9109993.

It is an arithmetic number, because the mean of its divisors is an integer number (1323886410).

Almost surely, 2^30121280380 is an apocalyptic number.

It is an amenable number.

30121280380 is an abundant number, since it is smaller than the sum of its proper divisors (33425267300).

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

30121280380 is a wasteful number, since it uses less digits than its factorization.

30121280380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5278 (or 5276 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 28.

Adding to 30121280380 its reverse (8308212103), we get a palindrome (38429492483).

The spelling of 30121280380 in words is "thirty billion, one hundred twenty-one million, two hundred eighty thousand, three hundred eighty".