102012330111221 has 8 divisors (see below), whose sum is σ = 102148125070680. Its totient is φ = 101876537887488.

The previous prime is 102012330111217. The next prime is 102012330111227. The reversal of 102012330111221 is 122111033210201.

It can be written as a sum of positive squares in 4 ways, for example, as 26881746627121 + 75130583484100 = 5184761^2 + 8667790^2 .

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 102012330111221 - 2² = 102012330111217 is a prime.

It is a super-2 number, since 2×102012330111221² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 102012330111193 and 102012330111202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102012330111227) 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, 80321225 + ... + 81581393.

It is an arithmetic number, because the mean of its divisors is an integer number (12768515633835).

Almost surely, 2^{102012330111221} is an apocalyptic number.

It is an amenable number.

102012330111221 is a deficient number, since it is larger than the sum of its proper divisors (135794959459).

102012330111221 is a wasteful number, since it uses less digits than its factorization.

102012330111221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1367863.

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 102012330111221 its reverse (122111033210201), we get a palindrome (224123363321422).

The spelling of 102012330111221 in words is "one hundred two trillion, twelve billion, three hundred thirty million, one hundred eleven thousand, two hundred twenty-one".