102101220221 has 16 divisors (see below), whose sum is σ = 137086954368. Its totient is φ = 73439438400.

The previous prime is 102101220217. The next prime is 102101220233. The reversal of 102101220221 is 122022101201.

It is a cyclic number.

It is not a de Polignac number, because 102101220221 - 2² = 102101220217 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 102101220196 and 102101220205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102101220421) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50998610 + ... + 51000611.

It is an arithmetic number, because the mean of its divisors is an integer number (8567934648).

Almost surely, 2^102101220221 is an apocalyptic number.

102101220221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

102101220221 is a deficient number, since it is larger than the sum of its proper divisors (34985734147).

102101220221 is a wasteful number, since it uses less digits than its factorization.

102101220221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101999252.

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

Adding to 102101220221 its reverse (122022101201), we get a palindrome (224123321422).

The spelling of 102101220221 in words is "one hundred two billion, one hundred one million, two hundred twenty thousand, two hundred twenty-one".