2002224157961 has 2 divisors, whose sum is σ = 2002224157962. Its totient is φ = 2002224157960.

The previous prime is 2002224157951. The next prime is 2002224158027. The reversal of 2002224157961 is 1697514222002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1957603932736 + 44620225225 = 1399144^2 + 211235^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2002224157961 is a prime.

It is not a weakly prime, because it can be changed into another prime (2002224157951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1001112078980 + 1001112078981.

It is an arithmetic number, because the mean of its divisors is an integer number (1001112078981).

Almost surely, 2^{2002224157961} is an apocalyptic number.

It is an amenable number.

2002224157961 is a deficient number, since it is larger than the sum of its proper divisors (1).

2002224157961 is an equidigital number, since it uses as much as digits as its factorization.

2002224157961 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 120960, while the sum is 41.

Adding to 2002224157961 its reverse (1697514222002), we get a palindrome (3699738379963).

The spelling of 2002224157961 in words is "two trillion, two billion, two hundred twenty-four million, one hundred fifty-seven thousand, nine hundred sixty-one".