10110100021 has 4 divisors (see below), whose sum is σ = 11554400032. Its totient is φ = 8665800012.

The previous prime is 10110100019. The next prime is 10110100027. The reversal of 10110100021 is 12000101101.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 10110100021 - 2¹ = 10110100019 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (7), and also a Moran number because the ratio is a prime number: 1444300003 = 10110100021 / (1 + 0 + 1 + 1 + 0 + 1 + 0 + 0 + 0 + 2 + 1).

It is a junction number, because it is equal to n+sod(n) for n = 10110099977 and 10110100013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10110100027) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 722149995 + ... + 722150008.

It is an arithmetic number, because the mean of its divisors is an integer number (2888600008).

Almost surely, 2^10110100021 is an apocalyptic number.

It is an amenable number.

10110100021 is a deficient number, since it is larger than the sum of its proper divisors (1444300011).

10110100021 is an equidigital number, since it uses as much as digits as its factorization.

10110100021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1444300010.

The product of its (nonzero) digits is 2, while the sum is 7.

Adding to 10110100021 its reverse (12000101101), we get a palindrome (22110201122).

The spelling of 10110100021 in words is "ten billion, one hundred ten million, one hundred thousand, twenty-one".