1013211021 has 16 divisors (see below), whose sum is σ = 1383489536. Its totient is φ = 659228976.

The previous prime is 1013211011. The next prime is 1013211047. The reversal of 1013211021 is 1201123101.

It is not a de Polignac number, because 1013211021 - 2¹⁸ = 1012948877 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1013210988 and 1013211006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1013211011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 212166 + ... + 216888.

It is an arithmetic number, because the mean of its divisors is an integer number (86468096).

Almost surely, 2^1013211021 is an apocalyptic number.

It is an amenable number.

1013211021 is a deficient number, since it is larger than the sum of its proper divisors (370278515).

1013211021 is a wasteful number, since it uses less digits than its factorization.

1013211021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6432.

The product of its (nonzero) digits is 12, while the sum is 12.

The square root of 1013211021 is about 31830.9758097360. The cubic root of 1013211021 is about 1004.3844224126.

Adding to 1013211021 its reverse (1201123101), we get a palindrome (2214334122).

The spelling of 1013211021 in words is "one billion, thirteen million, two hundred eleven thousand, twenty-one".