121221020210219 has 2 divisors, whose sum is σ = 121221020210220. Its totient is φ = 121221020210218.

The previous prime is 121221020210201. The next prime is 121221020210249. The reversal of 121221020210219 is 912012020122121.

It is a weak prime.

It is an emirp because it is prime and its reverse (912012020122121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121221020210219 - 2⁴⁰ = 120121508582443 is a prime.

It is a super-2 number, since 2×121221020210219² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (121221020210249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60610510105109 + 60610510105110.

It is an arithmetic number, because the mean of its divisors is an integer number (60610510105110).

Almost surely, 2^{121221020210219} is an apocalyptic number.

121221020210219 is a deficient number, since it is larger than the sum of its proper divisors (1).

121221020210219 is an equidigital number, since it uses as much as digits as its factorization.

121221020210219 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 26.

The spelling of 121221020210219 in words is "one hundred twenty-one trillion, two hundred twenty-one billion, twenty million, two hundred ten thousand, two hundred nineteen".