121221210283 has 2 divisors, whose sum is σ = 121221210284. Its totient is φ = 121221210282.

The previous prime is 121221210211. The next prime is 121221210311. The reversal of 121221210283 is 382012122121.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121221210283 - 2¹⁷ = 121221079211 is a prime.

It is not a weakly prime, because it can be changed into another prime (121221210883) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60610605141 + 60610605142.

It is an arithmetic number, because the mean of its divisors is an integer number (60610605142).

Almost surely, 2^121221210283 is an apocalyptic number.

121221210283 is a deficient number, since it is larger than the sum of its proper divisors (1).

121221210283 is an equidigital number, since it uses as much as digits as its factorization.

121221210283 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 768, while the sum is 25.

The spelling of 121221210283 in words is "one hundred twenty-one billion, two hundred twenty-one million, two hundred ten thousand, two hundred eighty-three".