121442042221 has 8 divisors (see below), whose sum is σ = 121635402624. Its totient is φ = 121248837360.

The previous prime is 121442042219. The next prime is 121442042243. The reversal of 121442042221 is 122240244121.

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 121442042221 - 2¹ = 121442042219 is a prime.

It is a super-2 number, since 2×121442042221² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121442042201) 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, 1576816 + ... + 1652038.

It is an arithmetic number, because the mean of its divisors is an integer number (15204425328).

Almost surely, 2^121442042221 is an apocalyptic number.

It is an amenable number.

121442042221 is a deficient number, since it is larger than the sum of its proper divisors (193360403).

121442042221 is a wasteful number, since it uses less digits than its factorization.

121442042221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77771.

The product of its (nonzero) digits is 2048, while the sum is 25.

Adding to 121442042221 its reverse (122240244121), we get a palindrome (243682286342).

It can be divided in two parts, 1214420 and 42221, that added together give a square (1256641 = 1121²).

The spelling of 121442042221 in words is "one hundred twenty-one billion, four hundred forty-two million, forty-two thousand, two hundred twenty-one".