10100110220021 has 4 divisors (see below), whose sum is σ = 10100178129132. Its totient is φ = 10100042310912.

The previous prime is 10100110220017. The next prime is 10100110220029. The reversal of 10100110220021 is 12002201100101.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 46327827121 + 10053782392900 = 215239^2 + 3170770^2 .

It is a cyclic number.

It is not a de Polignac number, because 10100110220021 - 2² = 10100110220017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10100110219984 and 10100110220011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10100110220029) 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, 33730970 + ... + 34029083.

It is an arithmetic number, because the mean of its divisors is an integer number (2525044532283).

Almost surely, 2^{10100110220021} is an apocalyptic number.

It is an amenable number.

10100110220021 is a deficient number, since it is larger than the sum of its proper divisors (67909111).

10100110220021 is an equidigital number, since it uses as much as digits as its factorization.

10100110220021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67909110.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 10100110220021 its reverse (12002201100101), we get a palindrome (22102311320122).

The spelling of 10100110220021 in words is "ten trillion, one hundred billion, one hundred ten million, two hundred twenty thousand, twenty-one".