121231211219 has 2 divisors, whose sum is σ = 121231211220. Its totient is φ = 121231211218.

The previous prime is 121231211209. The next prime is 121231211351. The reversal of 121231211219 is 912112132121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 121231211219 - 2⁴ = 121231211203 is a prime.

It is a super-2 number, since 2×121231211219² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (121231211209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60615605609 + 60615605610.

It is an arithmetic number, because the mean of its divisors is an integer number (60615605610).

Almost surely, 2^121231211219 is an apocalyptic number.

121231211219 is a deficient number, since it is larger than the sum of its proper divisors (1).

121231211219 is an equidigital number, since it uses as much as digits as its factorization.

121231211219 is an evil number, because the sum of its binary digits is even.

The product of its digits is 432, while the sum is 26.

The spelling of 121231211219 in words is "one hundred twenty-one billion, two hundred thirty-one million, two hundred eleven thousand, two hundred nineteen".