30121022021 has 8 divisors (see below), whose sum is σ = 30682616640. Its totient is φ = 29564603712.

The previous prime is 30121022003. The next prime is 30121022027. The reversal of 30121022021 is 12022012103.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30121022021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30121021987 and 30121022005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30121022027) 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, 1282331 + ... + 1305608.

It is an arithmetic number, because the mean of its divisors is an integer number (3835327080).

Almost surely, 2^30121022021 is an apocalyptic number.

It is an amenable number.

30121022021 is a deficient number, since it is larger than the sum of its proper divisors (561594619).

30121022021 is a wasteful number, since it uses less digits than its factorization.

30121022021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2588155.

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 30121022021 its reverse (12022012103), we get a palindrome (42143034124).

The spelling of 30121022021 in words is "thirty billion, one hundred twenty-one million, twenty-two thousand, twenty-one".