10101120210 has 96 divisors (see below), whose sum is σ = 27241110000. Its totient is φ = 2593801728.

The previous prime is 10101120203. The next prime is 10101120241. The reversal of 10101120210 is 1202110101.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 2622156849 + 7478963361 = 51207^2 + 86481^2 .

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 10101120192 and 10101120201.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1010316 + ... + 1020264.

Almost surely, 2^10101120210 is an apocalyptic number.

10101120210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 10101120210, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13620555000).

10101120210 is an abundant number, since it is smaller than the sum of its proper divisors (17139989790).

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

10101120210 is a wasteful number, since it uses less digits than its factorization.

10101120210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10380 (or 10377 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 10101120210 its reverse (1202110101), we get a palindrome (11303230311).

The spelling of 10101120210 in words is "ten billion, one hundred one million, one hundred twenty thousand, two hundred ten".