10102032221 has 4 divisors (see below), whose sum is σ = 10202052444. Its totient is φ = 10002012000.

The previous prime is 10102032181. The next prime is 10102032251. The reversal of 10102032221 is 12223020101.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4239832996 + 5862199225 = 65114^2 + 76565^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10102032221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10102032196 and 10102032205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10102032251) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50009960 + ... + 50010161.

It is an arithmetic number, because the mean of its divisors is an integer number (2550513111).

Almost surely, 2^10102032221 is an apocalyptic number.

It is an amenable number.

10102032221 is a deficient number, since it is larger than the sum of its proper divisors (100020223).

10102032221 is a wasteful number, since it uses less digits than its factorization.

10102032221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100020222.

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 10102032221 its reverse (12223020101), we get a palindrome (22325052322).

The spelling of 10102032221 in words is "ten billion, one hundred two million, thirty-two thousand, two hundred twenty-one".