2121332121131 has 2 divisors, whose sum is σ = 2121332121132. Its totient is φ = 2121332121130.

The previous prime is 2121332121121. The next prime is 2121332121143. The reversal of 2121332121131 is 1311212331212.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2121332121131 is a prime.

It is a super-2 number, since 2×2121332121131² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2121332121097 and 2121332121106.

It is not a weakly prime, because it can be changed into another prime (2121332121121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060666060565 + 1060666060566.

It is an arithmetic number, because the mean of its divisors is an integer number (1060666060566).

Almost surely, 2^{2121332121131} is an apocalyptic number.

2121332121131 is a deficient number, since it is larger than the sum of its proper divisors (1).

2121332121131 is an equidigital number, since it uses as much as digits as its factorization.

2121332121131 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 432, while the sum is 23.

Adding to 2121332121131 its reverse (1311212331212), we get a palindrome (3432544452343).

The spelling of 2121332121131 in words is "two trillion, one hundred twenty-one billion, three hundred thirty-two million, one hundred twenty-one thousand, one hundred thirty-one".