101100101021 has 2 divisors, whose sum is σ = 101100101022. Its totient is φ = 101100101020.

The previous prime is 101100100987. The next prime is 101100101033. The reversal of 101100101021 is 120101001101.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 67919656996 + 33180444025 = 260614^2 + 182155^2 .

It is an emirp because it is prime and its reverse (120101001101) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-101100101021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (101100101071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50550050510 + 50550050511.

It is an arithmetic number, because the mean of its divisors is an integer number (50550050511).

Almost surely, 2^101100101021 is an apocalyptic number.

It is an amenable number.

101100101021 is a deficient number, since it is larger than the sum of its proper divisors (1).

101100101021 is an equidigital number, since it uses as much as digits as its factorization.

101100101021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2, while the sum is 8.

Adding to 101100101021 its reverse (120101001101), we get a palindrome (221201102122).

The spelling of 101100101021 in words is "one hundred one billion, one hundred million, one hundred one thousand, twenty-one".