121200047 has 2 divisors, whose sum is σ = 121200048. Its totient is φ = 121200046.

The previous prime is 121200017. The next prime is 121200061. The reversal of 121200047 is 740002121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121200047 - 2¹² = 121195951 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121199998 and 121200034.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121200017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60600023 + 60600024.

It is an arithmetic number, because the mean of its divisors is an integer number (60600024).

Almost surely, 2^121200047 is an apocalyptic number.

121200047 is a deficient number, since it is larger than the sum of its proper divisors (1).

121200047 is an equidigital number, since it uses as much as digits as its factorization.

121200047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 112, while the sum is 17.

The square root of 121200047 is about 11009.0892902183. The cubic root of 121200047 is about 494.8811699930.

Adding to 121200047 its reverse (740002121), we get a palindrome (861202168).

The spelling of 121200047 in words is "one hundred twenty-one million, two hundred thousand, forty-seven".