1021500213 has 16 divisors (see below), whose sum is σ = 1370462976. Its totient is φ = 676782080.

The previous prime is 1021500203. The next prime is 1021500239. The reversal of 1021500213 is 3120051201.

It is a cyclic number.

It is not a de Polignac number, because 1021500213 - 2⁴ = 1021500197 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1021500192 and 1021500201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021500203) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 400420 + ... + 402962.

It is an arithmetic number, because the mean of its divisors is an integer number (85653936).

Almost surely, 2^1021500213 is an apocalyptic number.

It is an amenable number.

1021500213 is a deficient number, since it is larger than the sum of its proper divisors (348962763).

1021500213 is a wasteful number, since it uses less digits than its factorization.

1021500213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3324.

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

The square root of 1021500213 is about 31960.9169611887. The cubic root of 1021500213 is about 1007.1159803789.

Adding to 1021500213 its reverse (3120051201), we get a palindrome (4141551414).

The spelling of 1021500213 in words is "one billion, twenty-one million, five hundred thousand, two hundred thirteen".