102020201221210 has 24 divisors (see below), whose sum is σ = 195073921094940. Its totient is φ = 38407605164544.

The previous prime is 102020201221207. The next prime is 102020201221223. The reversal of 102020201221210 is 12122102020201.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 81411443163241 + 20608758057969 = 9022829^2 + 4539687^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17650550955 + ... + 17650556734.

Almost surely, 2^{102020201221210} is an apocalyptic number.

102020201221210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

102020201221210 is a deficient number, since it is larger than the sum of its proper divisors (93053719873730).

102020201221210 is a wasteful number, since it uses less digits than its factorization.

102020201221210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35301107730 (or 35301107713 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 102020201221210 its reverse (12122102020201), we get a palindrome (114142303241411).

The spelling of 102020201221210 in words is "one hundred two trillion, twenty billion, two hundred one million, two hundred twenty-one thousand, two hundred ten".