102102100021210 has 8 divisors (see below), whose sum is σ = 183783780038196. Its totient is φ = 40840840008480.

The previous prime is 102102100021153. The next prime is 102102100021211. The reversal of 102102100021210 is 12120001201201.

It can be written as a sum of positive squares in 2 ways, for example, as 86755756032729 + 15346343988481 = 9314277^2 + 3917441^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (102102100021211) 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, 5105105001051 + ... + 5105105001070.

Almost surely, 2^{102102100021210} is an apocalyptic number.

102102100021210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

102102100021210 is a deficient number, since it is larger than the sum of its proper divisors (81681680016986).

102102100021210 is a wasteful number, since it uses less digits than its factorization.

102102100021210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10210210002128.

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

Adding to 102102100021210 its reverse (12120001201201), we get a palindrome (114222101222411).

The spelling of 102102100021210 in words is "one hundred two trillion, one hundred two billion, one hundred million, twenty-one thousand, two hundred ten".