2100022381 has 2 divisors, whose sum is σ = 2100022382. Its totient is φ = 2100022380.

The previous prime is 2100022349. The next prime is 2100022403. The reversal of 2100022381 is 1832200012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2073345156 + 26677225 = 45534^2 + 5165^2 .

It is a cyclic number.

It is not a de Polignac number, because 2100022381 - 2⁵ = 2100022349 is a prime.

It is a super-2 number, since 2×2100022381² = 8820188001401818322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2100022681) 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, 1050011190 + 1050011191.

It is an arithmetic number, because the mean of its divisors is an integer number (1050011191).

Almost surely, 2^2100022381 is an apocalyptic number.

It is an amenable number.

2100022381 is a deficient number, since it is larger than the sum of its proper divisors (1).

2100022381 is an equidigital number, since it uses as much as digits as its factorization.

2100022381 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 2100022381 is about 45826.0011456378. The cubic root of 2100022381 is about 1280.5837142796.

Adding to 2100022381 its reverse (1832200012), we get a palindrome (3932222393).

The spelling of 2100022381 in words is "two billion, one hundred million, twenty-two thousand, three hundred eighty-one".