3123220001985 has 48 divisors (see below), whose sum is σ = 5568157702224. Its totient is φ = 1618289197056.

The previous prime is 3123220001921. The next prime is 3123220002011. The reversal of 3123220001985 is 5891000223213.

3123220001985 is a `hidden beast` number, since 31 + 232 + 200 + 0 + 198 + 5 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 49846367169 + 3073373634816 = 223263^2 + 1753104^2 .

It is not a de Polignac number, because 3123220001985 - 2⁶ = 3123220001921 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 273072 + ... + 2514161.

It is an arithmetic number, because the mean of its divisors is an integer number (116003285463).

Almost surely, 2^{3123220001985} is an apocalyptic number.

It is an amenable number.

3123220001985 is a deficient number, since it is larger than the sum of its proper divisors (2444937700239).

3123220001985 is a wasteful number, since it uses less digits than its factorization.

3123220001985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2787954 (or 2787951 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The spelling of 3123220001985 in words is "three trillion, one hundred twenty-three billion, two hundred twenty million, one thousand, nine hundred eighty-five".