101100211221 has 4 divisors (see below), whose sum is σ = 134800281632. Its totient is φ = 67400140812.

The previous prime is 101100211153. The next prime is 101100211237. The reversal of 101100211221 is 122112001101.

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 not a de Polignac number, because 101100211221 - 2¹⁷ = 101100080149 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 101100211197 and 101100211206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101100211621) 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, 16850035201 + ... + 16850035206.

It is an arithmetic number, because the mean of its divisors is an integer number (33700070408).

Almost surely, 2^101100211221 is an apocalyptic number.

It is an amenable number.

101100211221 is a deficient number, since it is larger than the sum of its proper divisors (33700070411).

101100211221 is an equidigital number, since it uses as much as digits as its factorization.

101100211221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33700070410.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 101100211221 its reverse (122112001101), we get a palindrome (223212212322).

The spelling of 101100211221 in words is "one hundred one billion, one hundred million, two hundred eleven thousand, two hundred twenty-one".