101220212221 has 8 divisors (see below), whose sum is σ = 102214748480. Its totient is φ = 100225903392.

The previous prime is 101220212213. The next prime is 101220212251. The reversal of 101220212221 is 122212022101.

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 101220212221 - 2³ = 101220212213 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 101220212195 and 101220212204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101220212251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 919510 + ... + 1023688.

It is an arithmetic number, because the mean of its divisors is an integer number (12776843560).

Almost surely, 2^101220212221 is an apocalyptic number.

It is an amenable number.

101220212221 is a deficient number, since it is larger than the sum of its proper divisors (994536259).

101220212221 is a wasteful number, since it uses less digits than its factorization.

101220212221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113715.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 101220212221 its reverse (122212022101), we get a palindrome (223432234322).

The spelling of 101220212221 in words is "one hundred one billion, two hundred twenty million, two hundred twelve thousand, two hundred twenty-one".