101021111221 has 8 divisors (see below), whose sum is σ = 105424188480. Its totient is φ = 96618938592.

The previous prime is 101021111203. The next prime is 101021111281. The reversal of 101021111221 is 122111120101.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 101021111221 - 2²⁷ = 100886893493 is a prime.

It is a super-2 number, since 2×101021111221² (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 (101021111281) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7186 + ... + 449548.

It is an arithmetic number, because the mean of its divisors is an integer number (13178023560).

Almost surely, 2^101021111221 is an apocalyptic number.

It is an amenable number.

101021111221 is a deficient number, since it is larger than the sum of its proper divisors (4403077259).

101021111221 is an equidigital number, since it uses as much as digits as its factorization.

101021111221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 452315.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 101021111221 its reverse (122111120101), we get a palindrome (223132231322).

The spelling of 101021111221 in words is "one hundred one billion, twenty-one million, one hundred eleven thousand, two hundred twenty-one".