1221121001119 has 2 divisors, whose sum is σ = 1221121001120. Its totient is φ = 1221121001118.

The previous prime is 1221121001099. The next prime is 1221121001179. The reversal of 1221121001119 is 9111001211221.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1221121001119 - 2⁷ = 1221121000991 is a prime.

It is a super-2 number, since 2×1221121001119² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1221121001119.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1221121001179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610560500559 + 610560500560.

It is an arithmetic number, because the mean of its divisors is an integer number (610560500560).

Almost surely, 2^{1221121001119} is an apocalyptic number.

1221121001119 is a deficient number, since it is larger than the sum of its proper divisors (1).

1221121001119 is an equidigital number, since it uses as much as digits as its factorization.

1221121001119 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 22.

The spelling of 1221121001119 in words is "one trillion, two hundred twenty-one billion, one hundred twenty-one million, one thousand, one hundred nineteen".