10021421331 has 24 divisors (see below), whose sum is σ = 15016432704. Its totient is φ = 6678757800.

The previous prime is 10021421329. The next prime is 10021421339. The reversal of 10021421331 is 13312412001.

10021421331 is a `hidden beast` number, since 100 + 214 + 21 + 331 = 666.

It is not a de Polignac number, because 10021421331 - 2¹ = 10021421329 is a prime.

It is a super-2 number, since 2×10021421331² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (10021421339) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1125760 + ... + 1134626.

It is an arithmetic number, because the mean of its divisors is an integer number (625684696).

Almost surely, 2^10021421331 is an apocalyptic number.

10021421331 is a deficient number, since it is larger than the sum of its proper divisors (4995011373).

10021421331 is an frugal number, since it uses more digits than its factorization.

10021421331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13533 (or 13521 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 10021421331 its reverse (13312412001), we get a palindrome (23333833332).

The spelling of 10021421331 in words is "ten billion, twenty-one million, four hundred twenty-one thousand, three hundred thirty-one".