101021100221 has 4 divisors (see below), whose sum is σ = 101022677952. Its totient is φ = 101019522492.

The previous prime is 101021100199. The next prime is 101021100233. The reversal of 101021100221 is 122001120101.

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 101021100221 - 2¹⁰ = 101021099197 is a prime.

It is a super-2 number, since 2×101021100221² (a number of 23 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 (101021100241) 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, 688571 + ... + 822296.

It is an arithmetic number, because the mean of its divisors is an integer number (25255669488).

Almost surely, 2^101021100221 is an apocalyptic number.

It is an amenable number.

101021100221 is a deficient number, since it is larger than the sum of its proper divisors (1577731).

101021100221 is an equidigital number, since it uses as much as digits as its factorization.

101021100221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1577730.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 101021100221 its reverse (122001120101), we get a palindrome (223022220322).

The spelling of 101021100221 in words is "one hundred one billion, twenty-one million, one hundred thousand, two hundred twenty-one".