121772149 has 2 divisors, whose sum is σ = 121772150. Its totient is φ = 121772148.

The previous prime is 121772137. The next prime is 121772177. The reversal of 121772149 is 941277121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 121220100 + 552049 = 11010^2 + 743^2 .

It is a cyclic number.

It is not a de Polignac number, because 121772149 - 2⁵ = 121772117 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121772179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60886074 + 60886075.

It is an arithmetic number, because the mean of its divisors is an integer number (60886075).

Almost surely, 2^121772149 is an apocalyptic number.

It is an amenable number.

121772149 is a deficient number, since it is larger than the sum of its proper divisors (1).

121772149 is an equidigital number, since it uses as much as digits as its factorization.

121772149 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7056, while the sum is 34.

The square root of 121772149 is about 11035.0418667081. The cubic root of 121772149 is about 495.6586124753.

The spelling of 121772149 in words is "one hundred twenty-one million, seven hundred seventy-two thousand, one hundred forty-nine".