101101222121021 has 4 divisors (see below), whose sum is σ = 101995923201852. Its totient is φ = 100206521040192.

The previous prime is 101101222120999. The next prime is 101101222121059. The reversal of 101101222121021 is 120121222101101.

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 50598325562500 + 50502896558521 = 7113250^2 + 7106539^2 .

It is a cyclic number.

It is not a de Polignac number, because 101101222121021 - 2⁶ = 101101222120957 is a prime.

It is a super-2 number, since 2×101101222121021² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101101222141021) 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, 447350540246 + ... + 447350540471.

It is an arithmetic number, because the mean of its divisors is an integer number (25498980800463).

Almost surely, 2^{101101222121021} is an apocalyptic number.

It is an amenable number.

101101222121021 is a deficient number, since it is larger than the sum of its proper divisors (894701080831).

101101222121021 is an equidigital number, since it uses as much as digits as its factorization.

101101222121021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 894701080830.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 101101222121021 its reverse (120121222101101), we get a palindrome (221222444222122).

The spelling of 101101222121021 in words is "one hundred one trillion, one hundred one billion, two hundred twenty-two million, one hundred twenty-one thousand, twenty-one".