3125001021 has 16 divisors (see below), whose sum is σ = 4265387520. Its totient is φ = 2034442800.

The previous prime is 3125000987. The next prime is 3125001037. The reversal of 3125001021 is 1201005213.

It is not a de Polignac number, because 3125001021 - 2¹⁷ = 3124869949 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3125001071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31735 + ... + 85188.

It is an arithmetic number, because the mean of its divisors is an integer number (266586720).

Almost surely, 2^3125001021 is an apocalyptic number.

It is an amenable number.

3125001021 is a deficient number, since it is larger than the sum of its proper divisors (1140386499).

3125001021 is a wasteful number, since it uses less digits than its factorization.

3125001021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117136.

The product of its (nonzero) digits is 60, while the sum is 15.

The square root of 3125001021 is about 55901.7085695956. The cubic root of 3125001021 is about 1462.0090283289.

Adding to 3125001021 its reverse (1201005213), we get a palindrome (4326006234).

The spelling of 3125001021 in words is "three billion, one hundred twenty-five million, one thousand, twenty-one".