1000000221131 has 2 divisors, whose sum is σ = 1000000221132. Its totient is φ = 1000000221130.

The previous prime is 1000000221107. The next prime is 1000000221203. The reversal of 1000000221131 is 1311220000001.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1000000221131 - 2³⁸ = 725122314187 is a prime.

It is a super-2 number, since 2×1000000221131² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1000000221331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500000110565 + 500000110566.

It is an arithmetic number, because the mean of its divisors is an integer number (500000110566).

Almost surely, 2^{1000000221131} is an apocalyptic number.

1000000221131 is a deficient number, since it is larger than the sum of its proper divisors (1).

1000000221131 is an equidigital number, since it uses as much as digits as its factorization.

1000000221131 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12, while the sum is 11.

Adding to 1000000221131 its reverse (1311220000001), we get a palindrome (2311220221132).

The spelling of 1000000221131 in words is "one trillion, two hundred twenty-one thousand, one hundred thirty-one".