1021000113 has 48 divisors (see below), whose sum is σ = 1767456000. Its totient is φ = 580807584.

The previous prime is 1021000103. The next prime is 1021000121. The reversal of 1021000113 is 3110001201.

It is not a de Polignac number, because 1021000113 - 2⁸ = 1020999857 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1021000095 and 1021000104.

It is not an unprimeable number, because it can be changed into a prime (1021000103) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 314583 + ... + 317811.

It is an arithmetic number, because the mean of its divisors is an integer number (36822000).

Almost surely, 2^1021000113 is an apocalyptic number.

It is an amenable number.

1021000113 is a deficient number, since it is larger than the sum of its proper divisors (746455887).

1021000113 is a wasteful number, since it uses less digits than its factorization.

1021000113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3491 (or 3478 counting only the distinct ones).

The product of its (nonzero) digits is 6, while the sum is 9.

The square root of 1021000113 is about 31953.0923855579. The cubic root of 1021000113 is about 1006.9516009330.

Adding to 1021000113 its reverse (3110001201), we get a palindrome (4131001314).

The spelling of 1021000113 in words is "one billion, twenty-one million, one hundred thirteen", and thus it is an aban number.