102201120121 has 4 divisors (see below), whose sum is σ = 102285099252. Its totient is φ = 102117140992.

The previous prime is 102201120089. The next prime is 102201120143. The reversal of 102201120121 is 121021102201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 121021102201 = 137597 ⋅879533.

It can be written as a sum of positive squares in 2 ways, for example, as 13417978896 + 88783141225 = 115836^2 + 297965^2 .

It is a cyclic number.

It is not a de Polignac number, because 102201120121 - 2⁵ = 102201120089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102201126121) 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, 41987740 + ... + 41990173.

It is an arithmetic number, because the mean of its divisors is an integer number (25571274813).

Almost surely, 2^102201120121 is an apocalyptic number.

It is an amenable number.

102201120121 is a deficient number, since it is larger than the sum of its proper divisors (83979131).

102201120121 is an equidigital number, since it uses as much as digits as its factorization.

102201120121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83979130.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 102201120121 its reverse (121021102201), we get a palindrome (223222222322).

The spelling of 102201120121 in words is "one hundred two billion, two hundred one million, one hundred twenty thousand, one hundred twenty-one".