102021212100210 has 32 divisors (see below), whose sum is σ = 263685594352320. Its totient is φ = 25112913747648.

The previous prime is 102021212100191. The next prime is 102021212100211. The reversal of 102021212100210 is 12001212120201.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 102021212100210.

It is not an unprimeable number, because it can be changed into a prime (102021212100211) 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, 130796425380 + ... + 130796426159.

It is an arithmetic number, because the mean of its divisors is an integer number (8240174823510).

Almost surely, 2^{102021212100210} is an apocalyptic number.

102021212100210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

102021212100210 is an abundant number, since it is smaller than the sum of its proper divisors (161664382252110).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

102021212100210 is a wasteful number, since it uses less digits than its factorization.

102021212100210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 261592851562.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 102021212100210 its reverse (12001212120201), we get a palindrome (114022424220411).

The spelling of 102021212100210 in words is "one hundred two trillion, twenty-one billion, two hundred twelve million, one hundred thousand, two hundred ten".