121056106442 has 16 divisors (see below), whose sum is σ = 192427288200. Its totient is φ = 57015490560.

The previous prime is 121056106403. The next prime is 121056106447. The reversal of 121056106442 is 244601650121.

It can be written as a sum of positive squares in 4 ways, for example, as 90884763841 + 30171342601 = 301471^2 + 173699^2 .

It is a junction number, because it is equal to n+sod(n) for n = 121056106399 and 121056106408.

It is not an unprimeable number, because it can be changed into a prime (121056106447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25450967 + ... + 25455722.

Almost surely, 2^121056106442 is an apocalyptic number.

121056106442 is a deficient number, since it is larger than the sum of its proper divisors (71371181758).

121056106442 is a wasteful number, since it uses less digits than its factorization.

121056106442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50906761.

The product of its (nonzero) digits is 11520, while the sum is 32.

Adding to 121056106442 its reverse (244601650121), we get a palindrome (365657756563).

The spelling of 121056106442 in words is "one hundred twenty-one billion, fifty-six million, one hundred six thousand, four hundred forty-two".