201211009919 has 2 divisors, whose sum is σ = 201211009920. Its totient is φ = 201211009918.

The previous prime is 201211009891. The next prime is 201211009931. The reversal of 201211009919 is 919900112102.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 201211009919 - 2⁸ = 201211009663 is a prime.

It is a super-2 number, since 2×201211009919² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201211002919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100605504959 + 100605504960.

It is an arithmetic number, because the mean of its divisors is an integer number (100605504960).

Almost surely, 2^201211009919 is an apocalyptic number.

201211009919 is a deficient number, since it is larger than the sum of its proper divisors (1).

201211009919 is an equidigital number, since it uses as much as digits as its factorization.

201211009919 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2916, while the sum is 35.

The spelling of 201211009919 in words is "two hundred one billion, two hundred eleven million, nine thousand, nine hundred nineteen".