1221102121219 has 2 divisors, whose sum is σ = 1221102121220. Its totient is φ = 1221102121218.

The previous prime is 1221102121181. The next prime is 1221102121229. The reversal of 1221102121219 is 9121212011221.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1221102121219 is a prime.

It is a super-2 number, since 2×1221102121219² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1221102121193 and 1221102121202.

It is not a weakly prime, because it can be changed into another prime (1221102121229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610551060609 + 610551060610.

It is an arithmetic number, because the mean of its divisors is an integer number (610551060610).

Almost surely, 2^{1221102121219} is an apocalyptic number.

1221102121219 is a deficient number, since it is larger than the sum of its proper divisors (1).

1221102121219 is an equidigital number, since it uses as much as digits as its factorization.

1221102121219 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 25.

The spelling of 1221102121219 in words is "one trillion, two hundred twenty-one billion, one hundred two million, one hundred twenty-one thousand, two hundred nineteen".