1002111222251 has 2 divisors, whose sum is σ = 1002111222252. Its totient is φ = 1002111222250.

The previous prime is 1002111222227. The next prime is 1002111222331. The reversal of 1002111222251 is 1522221112001.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1002111222251 - 2²² = 1002107027947 is a prime.

It is a super-3 number, since 3×1002111222251³ (a number of 37 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (1002111252251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 501055611125 + 501055611126.

It is an arithmetic number, because the mean of its divisors is an integer number (501055611126).

Almost surely, 2^{1002111222251} is an apocalyptic number.

1002111222251 is a deficient number, since it is larger than the sum of its proper divisors (1).

1002111222251 is an equidigital number, since it uses as much as digits as its factorization.

1002111222251 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 160, while the sum is 20.

Adding to 1002111222251 its reverse (1522221112001), we get a palindrome (2524332334252).

The spelling of 1002111222251 in words is "one trillion, two billion, one hundred eleven million, two hundred twenty-two thousand, two hundred fifty-one".