101000111021 has 4 divisors (see below), whose sum is σ = 104482873500. Its totient is φ = 97517348544.

The previous prime is 101000110891. The next prime is 101000111057. The reversal of 101000111021 is 120111000101.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 120111000101 = 97 ⋅1238257733.

It can be written as a sum of positive squares in 2 ways, for example, as 40785822025 + 60214288996 = 201955^2 + 245386^2 .

It is a cyclic number.

It is not a de Polignac number, because 101000111021 - 2²² = 100995916717 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101000110021) 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, 1741381196 + ... + 1741381253.

It is an arithmetic number, because the mean of its divisors is an integer number (26120718375).

Almost surely, 2^101000111021 is an apocalyptic number.

It is an amenable number.

101000111021 is a deficient number, since it is larger than the sum of its proper divisors (3482762479).

101000111021 is an equidigital number, since it uses as much as digits as its factorization.

101000111021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3482762478.

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

Adding to 101000111021 its reverse (120111000101), we get a palindrome (221111111122).

The spelling of 101000111021 in words is "one hundred one billion, one hundred eleven thousand, twenty-one".