10101001101021 has 48 divisors (see below), whose sum is σ = 15164390252544. Its totient is φ = 6474658097952.

The previous prime is 10101001101017. The next prime is 10101001101073. The reversal of 10101001101021 is 12010110010101.

It is not a de Polignac number, because 10101001101021 - 2² = 10101001101017 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 10101001100994 and 10101001101012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10101001108021) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 9915576 + ... + 10886718.

It is an arithmetic number, because the mean of its divisors is an integer number (315924796928).

Almost surely, 2^{10101001101021} is an apocalyptic number.

It is an amenable number.

10101001101021 is a deficient number, since it is larger than the sum of its proper divisors (5063389151523).

10101001101021 is a wasteful number, since it uses less digits than its factorization.

10101001101021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 971630 (or 971627 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 9.

Adding to 10101001101021 its reverse (12010110010101), we get a palindrome (22111111111122).

The spelling of 10101001101021 in words is "ten trillion, one hundred one billion, one million, one hundred one thousand, twenty-one".