121636969 has 4 divisors (see below), whose sum is σ = 121879296. Its totient is φ = 121394644.

The previous prime is 121636967. The next prime is 121636973. The reversal of 121636969 is 969636121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 969636121 = 383 ⋅2531687.

It is a cyclic number.

It is not a de Polignac number, because 121636969 - 2¹ = 121636967 is a prime.

It is a super-2 number, since 2×121636969² = 29591104455013922, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a plaindrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (121636967) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 120409 + ... + 121414.

It is an arithmetic number, because the mean of its divisors is an integer number (30469824).

Almost surely, 2^121636969 is an apocalyptic number.

It is an amenable number.

121636969 is a deficient number, since it is larger than the sum of its proper divisors (242327).

121636969 is an equidigital number, since it uses as much as digits as its factorization.

121636969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242326.

The product of its digits is 104976, while the sum is 43.

The square root of 121636969 is about 11028.9151325051. The cubic root of 121636969 is about 495.4751333557.

The spelling of 121636969 in words is "one hundred twenty-one million, six hundred thirty-six thousand, nine hundred sixty-nine".