30120213123 has 120 divisors (see below), whose sum is σ = 61491996720. Its totient is φ = 14442986880.

The previous prime is 30120213103. The next prime is 30120213127. The reversal of 30120213123 is 32131202103.

It is not a de Polignac number, because 30120213123 - 2⁹ = 30120212611 is a prime.

It is a super-3 number, since 3×30120213123³ (a number of 32 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 30120213096 and 30120213105.

It is not an unprimeable number, because it can be changed into a prime (30120213127) by changing a digit.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 541033 + ... + 594101.

It is an arithmetic number, because the mean of its divisors is an integer number (512433306).

Almost surely, 2^30120213123 is an apocalyptic number.

30120213123 is a gapful number since it is divisible by the number (33) formed by its first and last digit.

30120213123 is an abundant number, since it is smaller than the sum of its proper divisors (31371783597).

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

30120213123 is a wasteful number, since it uses less digits than its factorization.

30120213123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53119 (or 53103 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 30120213123 its reverse (32131202103), we get a palindrome (62251415226).

The spelling of 30120213123 in words is "thirty billion, one hundred twenty million, two hundred thirteen thousand, one hundred twenty-three".