121427219 has 4 divisors (see below), whose sum is σ = 122679144. Its totient is φ = 120175296.

The previous prime is 121427197. The next prime is 121427261. The reversal of 121427219 is 912724121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121427219 is a prime.

It is a super-3 number, since 3×121427219³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121427191 and 121427200.

It is not an unprimeable number, because it can be changed into a prime (121420219) 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, 625817 + ... + 626010.

It is an arithmetic number, because the mean of its divisors is an integer number (30669786).

Almost surely, 2^121427219 is an apocalyptic number.

121427219 is a deficient number, since it is larger than the sum of its proper divisors (1251925).

121427219 is an equidigital number, since it uses as much as digits as its factorization.

121427219 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1251924.

The product of its digits is 2016, while the sum is 29.

The square root of 121427219 is about 11019.4019347694. The cubic root of 121427219 is about 495.1901714625.

The spelling of 121427219 in words is "one hundred twenty-one million, four hundred twenty-seven thousand, two hundred nineteen".