121699061447 has 2 divisors, whose sum is σ = 121699061448. Its totient is φ = 121699061446.

The previous prime is 121699061413. The next prime is 121699061461. The reversal of 121699061447 is 744160996121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121699061447 - 2¹⁰ = 121699060423 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121699061395 and 121699061404.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121699061147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60849530723 + 60849530724.

It is an arithmetic number, because the mean of its divisors is an integer number (60849530724).

Almost surely, 2^121699061447 is an apocalyptic number.

121699061447 is a deficient number, since it is larger than the sum of its proper divisors (1).

121699061447 is an equidigital number, since it uses as much as digits as its factorization.

121699061447 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 653184, while the sum is 50.

The spelling of 121699061447 in words is "one hundred twenty-one billion, six hundred ninety-nine million, sixty-one thousand, four hundred forty-seven".