2121840313 has 2 divisors, whose sum is σ = 2121840314. Its totient is φ = 2121840312.

The previous prime is 2121840269. The next prime is 2121840341. The reversal of 2121840313 is 3130481212.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1810247209 + 311593104 = 42547^2 + 17652^2 .

It is a cyclic number.

It is not a de Polignac number, because 2121840313 - 2¹³ = 2121832121 is a prime.

It is not a weakly prime, because it can be changed into another prime (2125840313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060920156 + 1060920157.

It is an arithmetic number, because the mean of its divisors is an integer number (1060920157).

Almost surely, 2^2121840313 is an apocalyptic number.

It is an amenable number.

2121840313 is a deficient number, since it is larger than the sum of its proper divisors (1).

2121840313 is an equidigital number, since it uses as much as digits as its factorization.

2121840313 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 2121840313 is about 46063.4379198948. The cubic root of 2121840313 is about 1285.0032678686.

The spelling of 2121840313 in words is "two billion, one hundred twenty-one million, eight hundred forty thousand, three hundred thirteen".