1120100021 has 2 divisors, whose sum is σ = 1120100022. Its totient is φ = 1120100020.

The previous prime is 1120099997. The next prime is 1120100053. The reversal of 1120100021 is 1200010211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 664917796 + 455182225 = 25786^2 + 21335^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1120100021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1120099981 and 1120100008.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1120100921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 560050010 + 560050011.

It is an arithmetic number, because the mean of its divisors is an integer number (560050011).

Almost surely, 2^1120100021 is an apocalyptic number.

It is an amenable number.

1120100021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1120100021 is an equidigital number, since it uses as much as digits as its factorization.

1120100021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4, while the sum is 8.

The square root of 1120100021 is about 33467.8953775107. The cubic root of 1120100021 is about 1038.5297336436.

Adding to 1120100021 its reverse (1200010211), we get a palindrome (2320110232).

The spelling of 1120100021 in words is "one billion, one hundred twenty million, one hundred thousand, twenty-one".