30101144222221 has 4 divisors (see below), whose sum is σ = 30117215310172. Its totient is φ = 30085073134272.

The previous prime is 30101144222183. The next prime is 30101144222231. The reversal of 30101144222221 is 12222244110103.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6219108266596 + 23882035955625 = 2493814^2 + 4886925^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30101144222221 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 (30101144222231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8035541166 + ... + 8035544911.

It is an arithmetic number, because the mean of its divisors is an integer number (7529303827543).

Almost surely, 2^{30101144222221} is an apocalyptic number.

It is an amenable number.

30101144222221 is a deficient number, since it is larger than the sum of its proper divisors (16071087951).

30101144222221 is a wasteful number, since it uses less digits than its factorization.

30101144222221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16071087950.

The product of its (nonzero) digits is 1536, while the sum is 25.

Adding to 30101144222221 its reverse (12222244110103), we get a palindrome (42323388332324).

The spelling of 30101144222221 in words is "thirty trillion, one hundred one billion, one hundred forty-four million, two hundred twenty-two thousand, two hundred twenty-one".