121772061 has 12 divisors (see below), whose sum is σ = 181567360. Its totient is φ = 78562440.

The previous prime is 121772023. The next prime is 121772117. The reversal of 121772061 is 160277121.

It is not a de Polignac number, because 121772061 - 2⁷ = 121771933 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121771061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 217951 + ... + 218508.

Almost surely, 2^121772061 is an apocalyptic number.

It is an amenable number.

121772061 is a deficient number, since it is larger than the sum of its proper divisors (59795299).

121772061 is a wasteful number, since it uses less digits than its factorization.

121772061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 436496 (or 436493 counting only the distinct ones).

The product of its (nonzero) digits is 1176, while the sum is 27.

The square root of 121772061 is about 11035.0378794094. The cubic root of 121772061 is about 495.6584930775.

The spelling of 121772061 in words is "one hundred twenty-one million, seven hundred seventy-two thousand, sixty-one".