121047054427 has 4 divisors (see below), whose sum is σ = 130358366320. Its totient is φ = 111735742536.

The previous prime is 121047054413. The next prime is 121047054509. The reversal of 121047054427 is 724450740121.

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

It is a cyclic number.

It is not a de Polignac number, because 121047054427 - 2⁷ = 121047054299 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121047054827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4655655927 + ... + 4655655952.

It is an arithmetic number, because the mean of its divisors is an integer number (32589591580).

Almost surely, 2^121047054427 is an apocalyptic number.

121047054427 is a deficient number, since it is larger than the sum of its proper divisors (9311311893).

121047054427 is an equidigital number, since it uses as much as digits as its factorization.

121047054427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9311311892.

The product of its (nonzero) digits is 62720, while the sum is 37.

Adding to 121047054427 its reverse (724450740121), we get a palindrome (845497794548).

The spelling of 121047054427 in words is "one hundred twenty-one billion, forty-seven million, fifty-four thousand, four hundred twenty-seven".