2021121331131 has 8 divisors (see below), whose sum is σ = 3079803933184. Its totient is φ = 1154926474920.

The previous prime is 2021121331049. The next prime is 2021121331169. The reversal of 2021121331131 is 1311331211202.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2021121331131 - 2¹¹ = 2021121329083 is a prime.

It is a super-2 number, since 2×2021121331131² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 96243872911 = 2021121331131 / (2 + 0 + 2 + 1 + 1 + 2 + 1 + 3 + 3 + 1 + 1 + 3 + 1).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2021121331098 and 2021121331107.

It is not an unprimeable number, because it can be changed into a prime (2021121331181) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48121936435 + ... + 48121936476.

It is an arithmetic number, because the mean of its divisors is an integer number (384975491648).

Almost surely, 2^{2021121331131} is an apocalyptic number.

2021121331131 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

2021121331131 is a deficient number, since it is larger than the sum of its proper divisors (1058682602053).

2021121331131 is an equidigital number, since it uses as much as digits as its factorization.

2021121331131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96243872921.

The product of its (nonzero) digits is 216, while the sum is 21.

Adding to 2021121331131 its reverse (1311331211202), we get a palindrome (3332452542333).

The spelling of 2021121331131 in words is "two trillion, twenty-one billion, one hundred twenty-one million, three hundred thirty-one thousand, one hundred thirty-one".