30012112021 has 8 divisors (see below), whose sum is σ = 30089773784. Its totient is φ = 29934489600.

The previous prime is 30012112019. The next prime is 30012112027. The reversal of 30012112021 is 12021121003.

It can be written as a sum of positive squares in 4 ways, for example, as 1298809521 + 28713302500 = 36039^2 + 169450^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 30012112021 - 2¹ = 30012112019 is a prime.

It is a super-2 number, since 2×30012112021² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30012111992 and 30012112010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30012112027) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2071615 + ... + 2086051.

It is an arithmetic number, because the mean of its divisors is an integer number (3761221723).

Almost surely, 2^30012112021 is an apocalyptic number.

It is an amenable number.

30012112021 is a deficient number, since it is larger than the sum of its proper divisors (77661763).

30012112021 is a wasteful number, since it uses less digits than its factorization.

30012112021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19671.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 30012112021 its reverse (12021121003), we get a palindrome (42033233024).

The spelling of 30012112021 in words is "thirty billion, twelve million, one hundred twelve thousand, twenty-one".