12121111019489 has 2 divisors, whose sum is σ = 12121111019490. Its totient is φ = 12121111019488.

The previous prime is 12121111019473. The next prime is 12121111019509. The reversal of 12121111019489 is 98491011112121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10141931929600 + 1979179089889 = 3184640^2 + 1406833^2 .

It is a cyclic number.

It is not a de Polignac number, because 12121111019489 - 2⁴ = 12121111019473 is a prime.

It is a super-2 number, since 2×12121111019489² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12121111019419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6060555509744 + 6060555509745.

It is an arithmetic number, because the mean of its divisors is an integer number (6060555509745).

Almost surely, 2^{12121111019489} is an apocalyptic number.

It is an amenable number.

12121111019489 is a deficient number, since it is larger than the sum of its proper divisors (1).

12121111019489 is an equidigital number, since it uses as much as digits as its factorization.

12121111019489 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368, while the sum is 41.

The spelling of 12121111019489 in words is "twelve trillion, one hundred twenty-one billion, one hundred eleven million, nineteen thousand, four hundred eighty-nine".