101220012221 has 8 divisors (see below), whose sum is σ = 104739256920. Its totient is φ = 97702694208.

The previous prime is 101220012211. The next prime is 101220012233. The reversal of 101220012221 is 122210022101.

It can be written as a sum of positive squares in 4 ways, for example, as 2711284900 + 98508727321 = 52070^2 + 313861^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-101220012221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 101220012196 and 101220012205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101220012211) 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, 374366 + ... + 585311.

It is an arithmetic number, because the mean of its divisors is an integer number (13092407115).

Almost surely, 2^101220012221 is an apocalyptic number.

It is an amenable number.

101220012221 is a deficient number, since it is larger than the sum of its proper divisors (3519244699).

101220012221 is an equidigital number, since it uses as much as digits as its factorization.

101220012221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 963343.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 101220012221 its reverse (122210022101), we get a palindrome (223430034322).

The spelling of 101220012221 in words is "one hundred one billion, two hundred twenty million, twelve thousand, two hundred twenty-one".