100101100102021 has 4 divisors (see below), whose sum is σ = 100101501081612. Its totient is φ = 100100699122432.

The previous prime is 100101100101991. The next prime is 100101100102027. The reversal of 100101100102021 is 120201001101001.

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 39401808651396 + 60699291450625 = 6277086^2 + 7790975^2 .

It is a cyclic number.

It is not a de Polignac number, because 100101100102021 - 2¹⁵ = 100101100069253 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 100101100101989 and 100101100102007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100101100102027) 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, 200115100 + ... + 200614693.

It is an arithmetic number, because the mean of its divisors is an integer number (25025375270403).

Almost surely, 2^{100101100102021} is an apocalyptic number.

It is an amenable number.

100101100102021 is a deficient number, since it is larger than the sum of its proper divisors (400979591).

100101100102021 is an equidigital number, since it uses as much as digits as its factorization.

100101100102021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400979590.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 100101100102021 its reverse (120201001101001), we get a palindrome (220302101203022).

The spelling of 100101100102021 in words is "one hundred trillion, one hundred one billion, one hundred million, one hundred two thousand, twenty-one".