102031221 has 8 divisors (see below), whose sum is σ = 136157760. Its totient is φ = 67962752.

The previous prime is 102031213. The next prime is 102031231. The reversal of 102031221 is 122130201.

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 102031221 - 2³ = 102031213 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 102031197 and 102031206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102031211) 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, 10236 + ... + 17573.

It is an arithmetic number, because the mean of its divisors is an integer number (17019720).

Almost surely, 2^102031221 is an apocalyptic number.

It is an amenable number.

102031221 is a deficient number, since it is larger than the sum of its proper divisors (34126539).

102031221 is a wasteful number, since it uses less digits than its factorization.

102031221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29035.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 102031221 is about 10101.0504899243. The cubic root of 102031221 is about 467.2805394676.

Adding to 102031221 its reverse (122130201), we get a palindrome (224161422).

The spelling of 102031221 in words is "one hundred two million, thirty-one thousand, two hundred twenty-one".