121721422 has 8 divisors (see below), whose sum is σ = 183080736. Its totient is φ = 60694512.

The previous prime is 121721417. The next prime is 121721437. The reversal of 121721422 is 224127121.

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

It is a super-2 number, since 2×121721422² = 29632209147404168, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 121721393 and 121721402.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 82183 + ... + 83650.

It is an arithmetic number, because the mean of its divisors is an integer number (22885092).

Almost surely, 2^121721422 is an apocalyptic number.

121721422 is a deficient number, since it is larger than the sum of its proper divisors (61359314).

121721422 is a wasteful number, since it uses less digits than its factorization.

121721422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166202.

The product of its digits is 448, while the sum is 22.

The square root of 121721422 is about 11032.7431765631. The cubic root of 121721422 is about 495.5897769033.

Adding to 121721422 its reverse (224127121), we get a palindrome (345848543).

The spelling of 121721422 in words is "one hundred twenty-one million, seven hundred twenty-one thousand, four hundred twenty-two".