102120100021210 has 16 divisors (see below), whose sum is σ = 194628896511336. Its totient is φ = 38445214125568.

The previous prime is 102120100021207. The next prime is 102120100021213. The reversal of 102120100021210 is 12120001021201.

It is an interprime number because it is at equal distance from previous prime (102120100021207) and next prime (102120100021213).

It can be written as a sum of positive squares in 4 ways, for example, as 102114117153409 + 5982867801 = 10105153^2 + 77349^2 .

It is not an unprimeable number, because it can be changed into a prime (102120100021213) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 300353235187 + ... + 300353235526.

Almost surely, 2^{102120100021210} is an apocalyptic number.

102120100021210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

102120100021210 is a deficient number, since it is larger than the sum of its proper divisors (92508796490126).

102120100021210 is a wasteful number, since it uses less digits than its factorization.

102120100021210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 600706470737.

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

Adding to 102120100021210 its reverse (12120001021201), we get a palindrome (114240101042411).

Subtracting from 102120100021210 its reverse (12120001021201), we obtain a palindrome (90000099000009).

The spelling of 102120100021210 in words is "one hundred two trillion, one hundred twenty billion, one hundred million, twenty-one thousand, two hundred ten".