121286819 has 2 divisors, whose sum is σ = 121286820. Its totient is φ = 121286818.

The previous prime is 121286783. The next prime is 121286827. The reversal of 121286819 is 918682121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121286819 - 2¹² = 121282723 is a prime.

It is a super-2 number, since 2×121286819² = 29420984926277522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (121246819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60643409 + 60643410.

It is an arithmetic number, because the mean of its divisors is an integer number (60643410).

Almost surely, 2^121286819 is an apocalyptic number.

121286819 is a deficient number, since it is larger than the sum of its proper divisors (1).

121286819 is an equidigital number, since it uses as much as digits as its factorization.

121286819 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13824, while the sum is 38.

The square root of 121286819 is about 11013.0295105389. The cubic root of 121286819 is about 494.9992436134. Note that the first 3 decimals are identical.

The spelling of 121286819 in words is "one hundred twenty-one million, two hundred eighty-six thousand, eight hundred nineteen".