30012121111221 has 12 divisors (see below), whose sum is σ = 43401074341248. Its totient is φ = 19984896401064.

The previous prime is 30012121111157. The next prime is 30012121111303. The reversal of 30012121111221 is 12211112121003.

It is a happy number.

30012121111221 is a `hidden beast` number, since 300 + 1 + 21 + 211 + 112 + 21 = 666.

It is not a de Polignac number, because 30012121111221 - 2⁶ = 30012121111157 is a prime.

It is a super-2 number, since 2×30012121111221² (a number of 28 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 30012121111194 and 30012121111203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30012121110221) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1932020115 + ... + 1932035648.

It is an arithmetic number, because the mean of its divisors is an integer number (3616756195104).

Almost surely, 2^{30012121111221} is an apocalyptic number.

It is an amenable number.

30012121111221 is a deficient number, since it is larger than the sum of its proper divisors (13388953230027).

30012121111221 is a wasteful number, since it uses less digits than its factorization.

30012121111221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3864056632 (or 3864056629 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 18.

Adding to 30012121111221 its reverse (12211112121003), we get a palindrome (42223233232224).

The spelling of 30012121111221 in words is "thirty trillion, twelve billion, one hundred twenty-one million, one hundred eleven thousand, two hundred twenty-one".