111221222001121 has 8 divisors (see below), whose sum is σ = 112823698181480. Its totient is φ = 109620878193792.

The previous prime is 111221222001079. The next prime is 111221222001151. The reversal of 111221222001121 is 121100222122111.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1033394233600 + 110187827767521 = 1016560^2 + 10497039^2 .

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 111221222001121 - 2¹⁷ = 111221221870049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111221222001151) 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, 532988190 + ... + 533196823.

It is an arithmetic number, because the mean of its divisors is an integer number (14102962272685).

Almost surely, 2^{111221222001121} is an apocalyptic number.

It is an amenable number.

111221222001121 is a deficient number, since it is larger than the sum of its proper divisors (1602476180359).

111221222001121 is a wasteful number, since it uses less digits than its factorization.

111221222001121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1066186515.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 111221222001121 its reverse (121100222122111), we get a palindrome (232321444123232).

The spelling of 111221222001121 in words is "one hundred eleven trillion, two hundred twenty-one billion, two hundred twenty-two million, one thousand, one hundred twenty-one".