102021221121 has 4 divisors (see below), whose sum is σ = 136028294832. Its totient is φ = 68014147412.

The previous prime is 102021221119. The next prime is 102021221167. The reversal of 102021221121 is 121122120201.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 102021221121 - 2¹ = 102021221119 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 102021221121.

It is not an unprimeable number, because it can be changed into a prime (102021221171) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17003536851 + ... + 17003536856.

It is an arithmetic number, because the mean of its divisors is an integer number (34007073708).

Almost surely, 2^102021221121 is an apocalyptic number.

It is an amenable number.

102021221121 is a deficient number, since it is larger than the sum of its proper divisors (34007073711).

102021221121 is an equidigital number, since it uses as much as digits as its factorization.

102021221121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34007073710.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 102021221121 its reverse (121122120201), we get a palindrome (223143341322).

The spelling of 102021221121 in words is "one hundred two billion, twenty-one million, two hundred twenty-one thousand, one hundred twenty-one".