10111212210 has 128 divisors (see below), whose sum is σ = 28023874560. Its totient is φ = 2311545600.

The previous prime is 10111212203. The next prime is 10111212211. The reversal of 10111212210 is 1221211101.

It is a super-2 number, since 2×10111212210² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (10111212211) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 399225 + ... + 423795.

It is an arithmetic number, because the mean of its divisors is an integer number (218936520).

Almost surely, 2^10111212210 is an apocalyptic number.

10111212210 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 10111212210, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14011937280).

10111212210 is an abundant number, since it is smaller than the sum of its proper divisors (17912662350).

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

10111212210 is a wasteful number, since it uses less digits than its factorization.

10111212210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24664.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 10111212210 its reverse (1221211101), we get a palindrome (11332423311).

The spelling of 10111212210 in words is "ten billion, one hundred eleven million, two hundred twelve thousand, two hundred ten".