101020212221 has 8 divisors (see below), whose sum is σ = 102032664888. Its totient is φ = 100008000000.

The previous prime is 101020212211. The next prime is 101020212269. The reversal of 101020212221 is 122212020101.

It can be written as a sum of positive squares in 4 ways, for example, as 26289055321 + 74731156900 = 162139^2 + 273370^2 .

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-101020212221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 101020212196 and 101020212205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101020212211) 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, 853541 + ... + 964661.

It is an arithmetic number, because the mean of its divisors is an integer number (12754083111).

Almost surely, 2^101020212221 is an apocalyptic number.

It is an amenable number.

101020212221 is a deficient number, since it is larger than the sum of its proper divisors (1012452667).

101020212221 is a wasteful number, since it uses less digits than its factorization.

101020212221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120223.

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

Adding to 101020212221 its reverse (122212020101), we get a palindrome (223232232322).

The spelling of 101020212221 in words is "one hundred one billion, twenty million, two hundred twelve thousand, two hundred twenty-one".