30311011121221 has 16 divisors (see below), whose sum is σ = 30935748695488. Its totient is φ = 29691367516800.

The previous prime is 30311011121197. The next prime is 30311011121243. The reversal of 30311011121221 is 12212111011303.

It is a cyclic number.

It is not a de Polignac number, because 30311011121221 - 2¹³ = 30311011113029 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30311011821221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 170695801 + ... + 170873281.

It is an arithmetic number, because the mean of its divisors is an integer number (1933484293468).

Almost surely, 2^{30311011121221} is an apocalyptic number.

It is an amenable number.

30311011121221 is a deficient number, since it is larger than the sum of its proper divisors (624737574267).

30311011121221 is a wasteful number, since it uses less digits than its factorization.

30311011121221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191812.

The product of its (nonzero) digits is 72, while the sum is 19.

Adding to 30311011121221 its reverse (12212111011303), we get a palindrome (42523122132524).

The spelling of 30311011121221 in words is "thirty trillion, three hundred eleven billion, eleven million, one hundred twenty-one thousand, two hundred twenty-one".