102011202121 has 4 divisors (see below), whose sum is σ = 102016397700. Its totient is φ = 102006006544.

The previous prime is 102011202119. The next prime is 102011202173. The reversal of 102011202121 is 121202110201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 121202110201 = 9013 ⋅13447477.

It can be written as a sum of positive squares in 2 ways, for example, as 37729177600 + 64282024521 = 194240^2 + 253539^2 .

It is a cyclic number.

It is not a de Polignac number, because 102011202121 - 2¹ = 102011202119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102011208121) 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, 2568226 + ... + 2607643.

It is an arithmetic number, because the mean of its divisors is an integer number (25504099425).

Almost surely, 2^102011202121 is an apocalyptic number.

It is an amenable number.

102011202121 is a deficient number, since it is larger than the sum of its proper divisors (5195579).

102011202121 is an equidigital number, since it uses as much as digits as its factorization.

102011202121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5195578.

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

Adding to 102011202121 its reverse (121202110201), we get a palindrome (223213312322).

The spelling of 102011202121 in words is "one hundred two billion, eleven million, two hundred two thousand, one hundred twenty-one".