101100220021 has 4 divisors (see below), whose sum is σ = 101100920544. Its totient is φ = 101099519500.

The previous prime is 101100220003. The next prime is 101100220079. The reversal of 101100220021 is 120022001101.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 101100220021 - 2³¹ = 98952736373 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 (101100220621) 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, 45235 + ... + 451936.

It is an arithmetic number, because the mean of its divisors is an integer number (25275230136).

Almost surely, 2^101100220021 is an apocalyptic number.

It is an amenable number.

101100220021 is a deficient number, since it is larger than the sum of its proper divisors (700523).

101100220021 is an equidigital number, since it uses as much as digits as its factorization.

101100220021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 700522.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 101100220021 its reverse (120022001101), we get a palindrome (221122221122).

The spelling of 101100220021 in words is "one hundred one billion, one hundred million, two hundred twenty thousand, twenty-one".