10101001001021 has 4 divisors (see below), whose sum is σ = 11544001144032. Its totient is φ = 8658000858012.

The previous prime is 10101001001017. The next prime is 10101001001107. The reversal of 10101001001021 is 12010010010101.

It is a happy number.

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 10101001001021 - 2² = 10101001001017 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10101001001011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 721500071495 + ... + 721500071508.

It is an arithmetic number, because the mean of its divisors is an integer number (2886000286008).

Almost surely, 2^{10101001001021} is an apocalyptic number.

It is an amenable number.

10101001001021 is a deficient number, since it is larger than the sum of its proper divisors (1443000143011).

10101001001021 is an equidigital number, since it uses as much as digits as its factorization.

10101001001021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1443000143010.

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

Adding to 10101001001021 its reverse (12010010010101), we get a palindrome (22111011011122).

The spelling of 10101001001021 in words is "ten trillion, one hundred one billion, one million, one thousand, twenty-one".