102120020210 has 16 divisors (see below), whose sum is σ = 197955731736. Its totient is φ = 37705853568.

The previous prime is 102120020207. The next prime is 102120020281. The reversal of 102120020210 is 12020021201.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 87586994401 + 14533025809 = 295951^2 + 120553^2 .

It is a junction number, because it is equal to n+sod(n) for n = 102120020191 and 102120020200.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 392769179 + ... + 392769438.

Almost surely, 2^102120020210 is an apocalyptic number.

102120020210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

102120020210 is a deficient number, since it is larger than the sum of its proper divisors (95835711526).

102120020210 is a wasteful number, since it uses less digits than its factorization.

102120020210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 785538637.

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

Adding to 102120020210 its reverse (12020021201), we get a palindrome (114140041411).

Subtracting from 102120020210 its reverse (12020021201), we obtain a palindrome (90099999009).

The spelling of 102120020210 in words is "one hundred two billion, one hundred twenty million, twenty thousand, two hundred ten".