121807144 has 16 divisors (see below), whose sum is σ = 232698420. Its totient is φ = 59754240.

The previous prime is 121807121. The next prime is 121807151. The reversal of 121807144 is 441708121.

It can be written as a sum of positive squares in 2 ways, for example, as 115304644 + 6502500 = 10738^2 + 2550^2 .

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, 143217 + ... + 144064.

Almost surely, 2^121807144 is an apocalyptic number.

It is an amenable number.

121807144 is a deficient number, since it is larger than the sum of its proper divisors (110891276).

121807144 is a wasteful number, since it uses less digits than its factorization.

121807144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 287340 (or 287336 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 28.

The square root of 121807144 is about 11036.6273833993. The cubic root of 121807144 is about 495.7060888809.

The spelling of 121807144 in words is "one hundred twenty-one million, eight hundred seven thousand, one hundred forty-four".