121369147 has 4 divisors (see below), whose sum is σ = 125554320. Its totient is φ = 117183976.

The previous prime is 121369121. The next prime is 121369163. The reversal of 121369147 is 741963121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 741963121 = 27239².

It is a cyclic number.

It is not a de Polignac number, because 121369147 - 2¹⁹ = 120844859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121369447) 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, 2092543 + ... + 2092600.

It is an arithmetic number, because the mean of its divisors is an integer number (31388580).

Almost surely, 2^121369147 is an apocalyptic number.

121369147 is a deficient number, since it is larger than the sum of its proper divisors (4185173).

121369147 is an equidigital number, since it uses as much as digits as its factorization.

121369147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4185172.

The product of its digits is 9072, while the sum is 34.

The square root of 121369147 is about 11016.7666309131. The cubic root of 121369147 is about 495.1112180798. Note that the first 3 decimals are identical.

The spelling of 121369147 in words is "one hundred twenty-one million, three hundred sixty-nine thousand, one hundred forty-seven".