121229137 has 2 divisors, whose sum is σ = 121229138. Its totient is φ = 121229136.

The previous prime is 121229107. The next prime is 121229167. The reversal of 121229137 is 731922121.

It is a balanced prime because it is at equal distance from previous prime (121229107) and next prime (121229167).

It can be written as a sum of positive squares in only one way, i.e., 98485776 + 22743361 = 9924^2 + 4769^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121229137 is a prime.

It is a super-3 number, since 3×121229137³ (a number of 25 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (121229107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60614568 + 60614569.

It is an arithmetic number, because the mean of its divisors is an integer number (60614569).

Almost surely, 2^121229137 is an apocalyptic number.

It is an amenable number.

121229137 is a deficient number, since it is larger than the sum of its proper divisors (1).

121229137 is an equidigital number, since it uses as much as digits as its factorization.

121229137 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1512, while the sum is 28.

The square root of 121229137 is about 11010.4103919881. The cubic root of 121229137 is about 494.9207600261.

The spelling of 121229137 in words is "one hundred twenty-one million, two hundred twenty-nine thousand, one hundred thirty-seven".