102120202121 has 16 divisors (see below), whose sum is σ = 123928156800. Its totient is φ = 82146597120.

The previous prime is 102120202111. The next prime is 102120202127. The reversal of 102120202121 is 121202021201.

It is not a de Polignac number, because 102120202121 - 2¹⁰ = 102120201097 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 102120202096 and 102120202105.

It is not an unprimeable number, because it can be changed into a prime (102120202127) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1187915 + ... + 1270976.

It is an arithmetic number, because the mean of its divisors is an integer number (7745509800).

Almost surely, 2^102120202121 is an apocalyptic number.

It is an amenable number.

102120202121 is a deficient number, since it is larger than the sum of its proper divisors (21807954679).

102120202121 is a wasteful number, since it uses less digits than its factorization.

102120202121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2459264.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 102120202121 its reverse (121202021201), we get a palindrome (223322223322).

The spelling of 102120202121 in words is "one hundred two billion, one hundred twenty million, two hundred two thousand, one hundred twenty-one".