102210001221 has 8 divisors (see below), whose sum is σ = 144296472384. Its totient is φ = 64131765440.

The previous prime is 102210001183. The next prime is 102210001237. The reversal of 102210001221 is 122100012201.

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 102210001221 - 2⁹ = 102210000709 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 102210001197 and 102210001206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102210001261) 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, 1002058785 + ... + 1002058886.

It is an arithmetic number, because the mean of its divisors is an integer number (18037059048).

Almost surely, 2^102210001221 is an apocalyptic number.

It is an amenable number.

102210001221 is a deficient number, since it is larger than the sum of its proper divisors (42086471163).

102210001221 is a wasteful number, since it uses less digits than its factorization.

102210001221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2004117691.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 102210001221 its reverse (122100012201), we get a palindrome (224310013422).

The spelling of 102210001221 in words is "one hundred two billion, two hundred ten million, one thousand, two hundred twenty-one".