121936442 has 12 divisors (see below), whose sum is σ = 184019598. Its totient is φ = 60598800.

The previous prime is 121936429. The next prime is 121936453. The reversal of 121936442 is 244639121.

It can be written as a sum of positive squares in 3 ways, for example, as 1792921 + 120143521 = 1339^2 + 10961^2 .

It is a junction number, because it is equal to n+sod(n) for n = 121936399 and 121936408.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 64592 + ... + 66452.

Almost surely, 2^121936442 is an apocalyptic number.

121936442 is a deficient number, since it is larger than the sum of its proper divisors (62083156).

121936442 is an equidigital number, since it uses as much as digits as its factorization.

121936442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2225 (or 2044 counting only the distinct ones).

The product of its digits is 10368, while the sum is 32.

The square root of 121936442 is about 11042.4835068928. The cubic root of 121936442 is about 495.8814238097.

The spelling of 121936442 in words is "one hundred twenty-one million, nine hundred thirty-six thousand, four hundred forty-two".