1021021713 has 32 divisors (see below), whose sum is σ = 1562457600. Its totient is φ = 658557648.

The previous prime is 1021021669. The next prime is 1021021739. The reversal of 1021021713 is 3171201201.

It is a happy number.

It is not a de Polignac number, because 1021021713 - 2¹² = 1021017617 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1021021013) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 120118 + ... + 128336.

It is an arithmetic number, because the mean of its divisors is an integer number (48826800).

Almost surely, 2^1021021713 is an apocalyptic number.

It is an amenable number.

1021021713 is a deficient number, since it is larger than the sum of its proper divisors (541435887).

1021021713 is a wasteful number, since it uses less digits than its factorization.

1021021713 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8378 (or 8372 counting only the distinct ones).

The product of its (nonzero) digits is 84, while the sum is 18.

The square root of 1021021713 is about 31953.4303792253. The cubic root of 1021021713 is about 1006.9587018141.

Adding to 1021021713 its reverse (3171201201), we get a palindrome (4192222914).

The spelling of 1021021713 in words is "one billion, twenty-one million, twenty-one thousand, seven hundred thirteen".