2011209859957 has 2 divisors, whose sum is σ = 2011209859958. Its totient is φ = 2011209859956.

The previous prime is 2011209859951. The next prime is 2011209859979. The reversal of 2011209859957 is 7599589021102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1889747851761 + 121462008196 = 1374681^2 + 348514^2 .

It is a cyclic number.

It is not a de Polignac number, because 2011209859957 - 2⁷ = 2011209859829 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2011209859951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1005604929978 + 1005604929979.

It is an arithmetic number, because the mean of its divisors is an integer number (1005604929979).

Almost surely, 2^{2011209859957} is an apocalyptic number.

It is an amenable number.

2011209859957 is a deficient number, since it is larger than the sum of its proper divisors (1).

2011209859957 is an equidigital number, since it uses as much as digits as its factorization.

2011209859957 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4082400, while the sum is 58.

The spelling of 2011209859957 in words is "two trillion, eleven billion, two hundred nine million, eight hundred fifty-nine thousand, nine hundred fifty-seven".