20121211111019 has 2 divisors, whose sum is σ = 20121211111020. Its totient is φ = 20121211111018.

The previous prime is 20121211111009. The next prime is 20121211111063. The reversal of 20121211111019 is 91011111212102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20121211111019 - 2⁴ = 20121211111003 is a prime.

It is a super-2 number, since 2×20121211111019² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20121211110985 and 20121211111003.

It is not a weakly prime, because it can be changed into another prime (20121211111009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10060605555509 + 10060605555510.

It is an arithmetic number, because the mean of its divisors is an integer number (10060605555510).

Almost surely, 2^{20121211111019} is an apocalyptic number.

20121211111019 is a deficient number, since it is larger than the sum of its proper divisors (1).

20121211111019 is an equidigital number, since it uses as much as digits as its factorization.

20121211111019 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 23.

The spelling of 20121211111019 in words is "twenty trillion, one hundred twenty-one billion, two hundred eleven million, one hundred eleven thousand, nineteen".