21020214143331 has 64 divisors (see below), whose sum is σ = 33893138119680. Its totient is φ = 12798648000000.

The previous prime is 21020214143329. The next prime is 21020214143393. The reversal of 21020214143331 is 13334141202012.

21020214143331 is a `hidden beast` number, since 2 + 10 + 2 + 0 + 214 + 1 + 433 + 3 + 1 = 666.

It is not a de Polignac number, because 21020214143331 - 2¹ = 21020214143329 is a prime.

It is a super-2 number, since 2×21020214143331² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 21020214143295 and 21020214143304.

It is not an unprimeable number, because it can be changed into a prime (21020214143531) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 12513211 + ... + 14093291.

It is an arithmetic number, because the mean of its divisors is an integer number (529580283120).

Almost surely, 2^{21020214143331} is an apocalyptic number.

21020214143331 is a deficient number, since it is larger than the sum of its proper divisors (12872923976349).

21020214143331 is a wasteful number, since it uses less digits than its factorization.

21020214143331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1580505 (or 1580499 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

Adding to 21020214143331 its reverse (13334141202012), we get a palindrome (34354355345343).

The spelling of 21020214143331 in words is "twenty-one trillion, twenty billion, two hundred fourteen million, one hundred forty-three thousand, three hundred thirty-one".