102020210121 has 16 divisors (see below), whose sum is σ = 138345966720. Its totient is φ = 66855400320.

The previous prime is 102020210119. The next prime is 102020210141. The reversal of 102020210121 is 121012020201.

It is not a de Polignac number, because 102020210121 - 2¹ = 102020210119 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 102020210097 and 102020210106.

It is not an unprimeable number, because it can be changed into a prime (102020210141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 106501 + ... + 464093.

It is an arithmetic number, because the mean of its divisors is an integer number (8646622920).

Almost surely, 2^102020210121 is an apocalyptic number.

It is an amenable number.

102020210121 is a deficient number, since it is larger than the sum of its proper divisors (36325756599).

102020210121 is a wasteful number, since it uses less digits than its factorization.

102020210121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 359216.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 102020210121 its reverse (121012020201), we get a palindrome (223032230322).

The spelling of 102020210121 in words is "one hundred two billion, twenty million, two hundred ten thousand, one hundred twenty-one".