121191490547 has 2 divisors, whose sum is σ = 121191490548. Its totient is φ = 121191490546.

The previous prime is 121191490529. The next prime is 121191490583. The reversal of 121191490547 is 745094191121.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121191490547 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121191490498 and 121191490507.

It is not a weakly prime, because it can be changed into another prime (121191490517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60595745273 + 60595745274.

It is an arithmetic number, because the mean of its divisors is an integer number (60595745274).

Almost surely, 2^121191490547 is an apocalyptic number.

121191490547 is a deficient number, since it is larger than the sum of its proper divisors (1).

121191490547 is an equidigital number, since it uses as much as digits as its factorization.

121191490547 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 90720, while the sum is 44.

The spelling of 121191490547 in words is "one hundred twenty-one billion, one hundred ninety-one million, four hundred ninety thousand, five hundred forty-seven".