221242404242122 has 8 divisors (see below), whose sum is σ = 351384994972836. Its totient is φ = 104114072584512.

The previous prime is 221242404242117. The next prime is 221242404242141.

221242404242122 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in 2 ways, for example, as 214382043687681 + 6860360554441 = 14641791^2 + 2619229^2 .

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

It is a Harshad number since it is a multiple of its sum of digits (34), and also a Moran number because the ratio is a prime number: 6507129536533 = 221242404242122 / (2 + 2 + 1 + 2 + 4 + 2 + 4 + 0 + 4 + 2 + 4 + 2 + 1 + 2 + 2).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3253564768233 + ... + 3253564768300.

Almost surely, 2^{221242404242122} is an apocalyptic number.

221242404242122 is a deficient number, since it is larger than the sum of its proper divisors (130142590730714).

221242404242122 is a wasteful number, since it uses less digits than its factorization.

221242404242122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6507129536552.

The product of its (nonzero) digits is 65536, while the sum is 34.

It can be divided in two parts, 22124240 and 4242122, that added together give a palindrome (26366362).

The spelling of 221242404242122 in words is "two hundred twenty-one trillion, two hundred forty-two billion, four hundred four million, two hundred forty-two thousand, one hundred twenty-two".