2121111111019 has 2 divisors, whose sum is σ = 2121111111020. Its totient is φ = 2121111111018.

The previous prime is 2121111111017. The next prime is 2121111111029. The reversal of 2121111111019 is 9101111111212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2121111111019 - 2¹ = 2121111111017 is a prime.

It is a super-2 number, since 2×2121111111019² (a number of 25 digits) contains 22 as substring.

Together with 2121111111017, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (2121111111011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060555555509 + 1060555555510.

It is an arithmetic number, because the mean of its divisors is an integer number (1060555555510).

Almost surely, 2^{2121111111019} is an apocalyptic number.

2121111111019 is a deficient number, since it is larger than the sum of its proper divisors (1).

2121111111019 is an equidigital number, since it uses as much as digits as its factorization.

2121111111019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36, while the sum is 22.

The spelling of 2121111111019 in words is "two trillion, one hundred twenty-one billion, one hundred eleven million, one hundred eleven thousand, nineteen".