30012312021 has 16 divisors (see below), whose sum is σ = 40596266880. Its totient is φ = 19719729920.

The previous prime is 30012312017. The next prime is 30012312041. The reversal of 30012312021 is 12021321003.

It is a cyclic number.

It is not a de Polignac number, because 30012312021 - 2² = 30012312017 is a prime.

It is a super-2 number, since 2×30012312021² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30012312041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 97680 + ... + 263753.

It is an arithmetic number, because the mean of its divisors is an integer number (2537266680).

Almost surely, 2^30012312021 is an apocalyptic number.

It is an amenable number.

30012312021 is a deficient number, since it is larger than the sum of its proper divisors (10583954859).

30012312021 is a wasteful number, since it uses less digits than its factorization.

30012312021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 361836.

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 30012312021 its reverse (12021321003), we get a palindrome (42033633024).

The spelling of 30012312021 in words is "thirty billion, twelve million, three hundred twelve thousand, twenty-one".