121135997 has 2 divisors, whose sum is σ = 121135998. Its totient is φ = 121135996.

The previous prime is 121135991. The next prime is 121136047. The reversal of 121135997 is 799531121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 62552281 + 58583716 = 7909^2 + 7654^2 .

It is a cyclic number.

It is not a de Polignac number, because 121135997 - 2¹⁰ = 121134973 is a prime.

It is a super-3 number, since 3×121135997³ (a number of 25 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 121135997.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121135991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60567998 + 60567999.

It is an arithmetic number, because the mean of its divisors is an integer number (60567999).

Almost surely, 2^121135997 is an apocalyptic number.

It is an amenable number.

121135997 is a deficient number, since it is larger than the sum of its proper divisors (1).

121135997 is an equidigital number, since it uses as much as digits as its factorization.

121135997 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17010, while the sum is 38.

The square root of 121135997 is about 11006.1799458304. The cubic root of 121135997 is about 494.7939788162.

The spelling of 121135997 in words is "one hundred twenty-one million, one hundred thirty-five thousand, nine hundred ninety-seven".