2011219957 has 2 divisors, whose sum is σ = 2011219958. Its totient is φ = 2011219956.

The previous prime is 2011219949. The next prime is 2011219979. The reversal of 2011219957 is 7599121102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2000683441 + 10536516 = 44729^2 + 3246^2 .

It is a cyclic number.

It is not a de Polignac number, because 2011219957 - 2³ = 2011219949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2011219927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1005609978 + 1005609979.

It is an arithmetic number, because the mean of its divisors is an integer number (1005609979).

Almost surely, 2^2011219957 is an apocalyptic number.

It is an amenable number.

2011219957 is a deficient number, since it is larger than the sum of its proper divisors (1).

2011219957 is an equidigital number, since it uses as much as digits as its factorization.

2011219957 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11340, while the sum is 37.

The square root of 2011219957 is about 44846.6270415067. The cubic root of 2011219957 is about 1262.2727011248.

The spelling of 2011219957 in words is "two billion, eleven million, two hundred nineteen thousand, nine hundred fifty-seven".