102210331221 has 24 divisors (see below), whose sum is σ = 156665789280. Its totient is φ = 66555557712.

The previous prime is 102210331217. The next prime is 102210331231. The reversal of 102210331221 is 122133012201.

102210331221 is a `hidden beast` number, since 102 + 2 + 10 + 331 + 221 = 666.

It is not a de Polignac number, because 102210331221 - 2² = 102210331217 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 102210331194 and 102210331203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102210331211) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4880466 + ... + 4901363.

It is an arithmetic number, because the mean of its divisors is an integer number (6527741220).

Almost surely, 2^102210331221 is an apocalyptic number.

It is an amenable number.

102210331221 is a deficient number, since it is larger than the sum of its proper divisors (54455458059).

102210331221 is an frugal number, since it uses more digits than its factorization.

102210331221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9781887 (or 9781875 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 102210331221 its reverse (122133012201), we get a palindrome (224343343422).

The spelling of 102210331221 in words is "one hundred two billion, two hundred ten million, three hundred thirty-one thousand, two hundred twenty-one".