102101211221 has 8 divisors (see below), whose sum is σ = 107515462080. Its totient is φ = 96691010688.

The previous prime is 102101211203. The next prime is 102101211283. The reversal of 102101211221 is 122112101201.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102101211221 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 102101211196 and 102101211205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102101210221) 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, 960761 + ... + 1061726.

It is an arithmetic number, because the mean of its divisors is an integer number (13439432760).

Almost surely, 2^102101211221 is an apocalyptic number.

It is an amenable number.

102101211221 is a deficient number, since it is larger than the sum of its proper divisors (5414250859).

102101211221 is a wasteful number, since it uses less digits than its factorization.

102101211221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2025163.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 102101211221 its reverse (122112101201), we get a palindrome (224213312422).

The spelling of 102101211221 in words is "one hundred two billion, one hundred one million, two hundred eleven thousand, two hundred twenty-one".