102121011221 has 8 divisors (see below), whose sum is σ = 103211151264. Its totient is φ = 101032421200.

The previous prime is 102121011193. The next prime is 102121011227. The reversal of 102121011221 is 122110121201.

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 102121011221 - 2¹⁴ = 102120994837 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102121011196 and 102121011205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102121011227) 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, 254795 + ... + 518808.

It is an arithmetic number, because the mean of its divisors is an integer number (12901393908).

Almost surely, 2^102121011221 is an apocalyptic number.

It is an amenable number.

102121011221 is a deficient number, since it is larger than the sum of its proper divisors (1090140043).

102121011221 is a wasteful number, since it uses less digits than its factorization.

102121011221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 775011.

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

Adding to 102121011221 its reverse (122110121201), we get a palindrome (224231132422).

The spelling of 102121011221 in words is "one hundred two billion, one hundred twenty-one million, eleven thousand, two hundred twenty-one".