30212123321 has 4 divisors (see below), whose sum is σ = 30212487972. Its totient is φ = 30211758672.

The previous prime is 30212123311. The next prime is 30212123369. The reversal of 30212123321 is 12332121203.

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 2 ways, for example, as 9176682025 + 21035441296 = 95795^2 + 145036^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30212123321 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30212123293 and 30212123302.

It is not an unprimeable number, because it can be changed into a prime (30212123311) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8591 + ... + 245963.

It is an arithmetic number, because the mean of its divisors is an integer number (7553121993).

Almost surely, 2^30212123321 is an apocalyptic number.

It is an amenable number.

30212123321 is a deficient number, since it is larger than the sum of its proper divisors (364651).

30212123321 is a wasteful number, since it uses less digits than its factorization.

30212123321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 364650.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 30212123321 its reverse (12332121203), we get a palindrome (42544244524).

The spelling of 30212123321 in words is "thirty billion, two hundred twelve million, one hundred twenty-three thousand, three hundred twenty-one".