1021143233161 has 2 divisors, whose sum is σ = 1021143233162. Its totient is φ = 1021143233160.

The previous prime is 1021143233147. The next prime is 1021143233177. The reversal of 1021143233161 is 1613323411201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1021079935225 + 63297936 = 1010485^2 + 7956^2 .

It is a cyclic number.

It is not a de Polignac number, because 1021143233161 - 2²¹ = 1021141136009 is a prime.

It is not a weakly prime, because it can be changed into another prime (1021143233261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510571616580 + 510571616581.

It is an arithmetic number, because the mean of its divisors is an integer number (510571616581).

Almost surely, 2^{1021143233161} is an apocalyptic number.

It is an amenable number.

1021143233161 is a deficient number, since it is larger than the sum of its proper divisors (1).

1021143233161 is an equidigital number, since it uses as much as digits as its factorization.

1021143233161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 28.

Adding to 1021143233161 its reverse (1613323411201), we get a palindrome (2634466644362).

The spelling of 1021143233161 in words is "one trillion, twenty-one billion, one hundred forty-three million, two hundred thirty-three thousand, one hundred sixty-one".