102020021210 has 8 divisors (see below), whose sum is σ = 183636038196. Its totient is φ = 40808008480.

The previous prime is 102020021179. The next prime is 102020021251. The reversal of 102020021210 is 12120020201.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 97239819889 + 4780201321 = 311833^2 + 69139^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 102020021191 and 102020021200.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5101001051 + ... + 5101001070.

Almost surely, 2^102020021210 is an apocalyptic number.

102020021210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

102020021210 is a deficient number, since it is larger than the sum of its proper divisors (81616016986).

102020021210 is a wasteful number, since it uses less digits than its factorization.

102020021210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10202002128.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 102020021210 its reverse (12120020201), we get a palindrome (114140041411).

The spelling of 102020021210 in words is "one hundred two billion, twenty million, twenty-one thousand, two hundred ten".