121047421 has 8 divisors (see below), whose sum is σ = 136605600. Its totient is φ = 106248240.

The previous prime is 121047391. The next prime is 121047469. The reversal of 121047421 is 124740121.

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

It is a cyclic number.

It is not a de Polignac number, because 121047421 - 2¹¹ = 121045373 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121047392 and 121047401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121047481) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 189411 + ... + 190048.

It is an arithmetic number, because the mean of its divisors is an integer number (17075700).

Almost surely, 2^121047421 is an apocalyptic number.

121047421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

121047421 is a deficient number, since it is larger than the sum of its proper divisors (15558179).

121047421 is a wasteful number, since it uses less digits than its factorization.

121047421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 379499.

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

The square root of 121047421 is about 11002.1552888514. The cubic root of 121047421 is about 494.6733497736.

Adding to 121047421 its reverse (124740121), we get a palindrome (245787542).

The spelling of 121047421 in words is "one hundred twenty-one million, forty-seven thousand, four hundred twenty-one".