1211000020319 has 2 divisors, whose sum is σ = 1211000020320. Its totient is φ = 1211000020318.

The previous prime is 1211000020303. The next prime is 1211000020327. The reversal of 1211000020319 is 9130200001121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1211000020319 - 2⁴ = 1211000020303 is a prime.

It is a super-2 number, since 2×1211000020319² (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 1211000020319.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1211000020369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605500010159 + 605500010160.

It is an arithmetic number, because the mean of its divisors is an integer number (605500010160).

Almost surely, 2^{1211000020319} is an apocalyptic number.

1211000020319 is a deficient number, since it is larger than the sum of its proper divisors (1).

1211000020319 is an equidigital number, since it uses as much as digits as its factorization.

1211000020319 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108, while the sum is 20.

The spelling of 1211000020319 in words is "one trillion, two hundred eleven billion, twenty thousand, three hundred nineteen".