101111321221 has 4 divisors (see below), whose sum is σ = 101130480000. Its totient is φ = 101092162444.

The previous prime is 101111321197. The next prime is 101111321237. The reversal of 101111321221 is 122123111101.

It is a happy number.

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 101111321221 - 2⁷ = 101111321093 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 101111321195 and 101111321204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101111321251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9571471 + ... + 9582028.

It is an arithmetic number, because the mean of its divisors is an integer number (25282620000).

Almost surely, 2^101111321221 is an apocalyptic number.

It is an amenable number.

101111321221 is a deficient number, since it is larger than the sum of its proper divisors (19158779).

101111321221 is an equidigital number, since it uses as much as digits as its factorization.

101111321221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19158778.

The product of its (nonzero) digits is 24, while the sum is 16.

Adding to 101111321221 its reverse (122123111101), we get a palindrome (223234432322).

The spelling of 101111321221 in words is "one hundred one billion, one hundred eleven million, three hundred twenty-one thousand, two hundred twenty-one".