100021127 has 2 divisors, whose sum is σ = 100021128. Its totient is φ = 100021126.

The previous prime is 100021121. The next prime is 100021133. The reversal of 100021127 is 721120001.

It is a balanced prime because it is at equal distance from previous prime (100021121) and next prime (100021133).

It is a cyclic number.

It is not a de Polignac number, because 100021127 - 2¹⁰ = 100020103 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100021121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50010563 + 50010564.

It is an arithmetic number, because the mean of its divisors is an integer number (50010564).

Almost surely, 2^100021127 is an apocalyptic number.

100021127 is a deficient number, since it is larger than the sum of its proper divisors (1).

100021127 is an equidigital number, since it uses as much as digits as its factorization.

100021127 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28, while the sum is 14.

The square root of 100021127 is about 10001.0562942121. The cubic root of 100021127 is about 464.1915686753.

Adding to 100021127 its reverse (721120001), we get a palindrome (821141128).

The spelling of 100021127 in words is "one hundred million, twenty-one thousand, one hundred twenty-seven".