102002201010121 has 4 divisors (see below), whose sum is σ = 102002665388932. Its totient is φ = 102001736631312.

The previous prime is 102002201010113. The next prime is 102002201010137. The reversal of 102002201010121 is 121010102200201.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 65580843240000 + 36421357770121 = 8098200^2 + 6035011^2 .

It is a cyclic number.

It is not a de Polignac number, because 102002201010121 - 2³ = 102002201010113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102002201010421) 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, 231859770 + ... + 232299283.

It is an arithmetic number, because the mean of its divisors is an integer number (25500666347233).

Almost surely, 2^{102002201010121} is an apocalyptic number.

It is an amenable number.

102002201010121 is a deficient number, since it is larger than the sum of its proper divisors (464378811).

102002201010121 is an equidigital number, since it uses as much as digits as its factorization.

102002201010121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 464378810.

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

Adding to 102002201010121 its reverse (121010102200201), we get a palindrome (223012303210322).

The spelling of 102002201010121 in words is "one hundred two trillion, two billion, two hundred one million, ten thousand, one hundred twenty-one".