121944279 has 4 divisors (see below), whose sum is σ = 162592376. Its totient is φ = 81296184.

The previous prime is 121944271. The next prime is 121944301. The reversal of 121944279 is 972449121.

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

It is not a de Polignac number, because 121944279 - 2³ = 121944271 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121944271) 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, 20324044 + ... + 20324049.

It is an arithmetic number, because the mean of its divisors is an integer number (40648094).

Almost surely, 2^121944279 is an apocalyptic number.

121944279 is a deficient number, since it is larger than the sum of its proper divisors (40648097).

121944279 is an equidigital number, since it uses as much as digits as its factorization.

121944279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40648096.

The product of its digits is 36288, while the sum is 39.

The square root of 121944279 is about 11042.8383579585. The cubic root of 121944279 is about 495.8920472116.

The spelling of 121944279 in words is "one hundred twenty-one million, nine hundred forty-four thousand, two hundred seventy-nine".