102120202121121 has 24 divisors (see below), whose sum is σ = 159466982301120. Its totient is φ = 62753808411936.

The previous prime is 102120202121111. The next prime is 102120202121173. The reversal of 102120202121121 is 121121202021201.

102120202121121 is a `hidden beast` number, since 10 + 212 + 0 + 202 + 121 + 121 = 666.

It is not a de Polignac number, because 102120202121121 - 2¹¹ = 102120202119073 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 102120202121094 and 102120202121103.

It is not an unprimeable number, because it can be changed into a prime (102120202121111) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8070185085 + ... + 8070197738.

It is an arithmetic number, because the mean of its divisors is an integer number (6644457595880).

Almost surely, 2^{102120202121121} is an apocalyptic number.

It is an amenable number.

102120202121121 is a deficient number, since it is larger than the sum of its proper divisors (57346780179999).

102120202121121 is a wasteful number, since it uses less digits than its factorization.

102120202121121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16140382885 (or 16140382882 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 102120202121121 its reverse (121121202021201), we get a palindrome (223241404142322).

The spelling of 102120202121121 in words is "one hundred two trillion, one hundred twenty billion, two hundred two million, one hundred twenty-one thousand, one hundred twenty-one".