121249969 has 8 divisors (see below), whose sum is σ = 123050592. Its totient is φ = 119457600.

The previous prime is 121249949. The next prime is 121249979. The reversal of 121249969 is 969942121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 121249969 - 2⁵ = 121249937 is a prime.

It is a super-2 number, since 2×121249969² = 29403109965001922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121249949) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31462 + ... + 35104.

It is an arithmetic number, because the mean of its divisors is an integer number (15381324).

Almost surely, 2^121249969 is an apocalyptic number.

It is an amenable number.

121249969 is a deficient number, since it is larger than the sum of its proper divisors (1800623).

121249969 is an equidigital number, since it uses as much as digits as its factorization.

121249969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4127.

The product of its digits is 69984, while the sum is 43.

The square root of 121249969 is about 11011.3563651350. The cubic root of 121249969 is about 494.9491074433.

The spelling of 121249969 in words is "one hundred twenty-one million, two hundred forty-nine thousand, nine hundred sixty-nine".