102122021221 has 8 divisors (see below), whose sum is σ = 112508870688. Its totient is φ = 91919010000.

The previous prime is 102122021179. The next prime is 102122021311. The reversal of 102122021221 is 122120221201.

It is a happy number.

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-102122021221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102122021195 and 102122021204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102122021621) 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, 45958395 + ... + 45960616.

It is an arithmetic number, because the mean of its divisors is an integer number (14063608836).

Almost surely, 2^102122021221 is an apocalyptic number.

102122021221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

102122021221 is a deficient number, since it is larger than the sum of its proper divisors (10386849467).

102122021221 is a wasteful number, since it uses less digits than its factorization.

102122021221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91919123.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 102122021221 its reverse (122120221201), we get a palindrome (224242242422).

It can be divided in two parts, 1021220 and 21221, that added together give a square (1042441 = 1021²).

The spelling of 102122021221 in words is "one hundred two billion, one hundred twenty-two million, twenty-one thousand, two hundred twenty-one".