11212121310 has 32 divisors (see below), whose sum is σ = 28979022240. Its totient is φ = 2759906688.

The previous prime is 11212121281. The next prime is 11212121311. The reversal of 11212121310 is 1312121211.

It is a super-2 number, since 2×11212121310² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 11212121310.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11212121311) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14374125 + ... + 14374904.

It is an arithmetic number, because the mean of its divisors is an integer number (905594445).

Almost surely, 2^11212121310 is an apocalyptic number.

11212121310 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11212121310 is an abundant number, since it is smaller than the sum of its proper divisors (17766900930).

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

11212121310 is a wasteful number, since it uses less digits than its factorization.

11212121310 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28749052.

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 11212121310 its reverse (1312121211), we get a palindrome (12524242521).

Subtracting from 11212121310 its reverse (1312121211), we obtain a palindrome (9900000099).

The spelling of 11212121310 in words is "eleven billion, two hundred twelve million, one hundred twenty-one thousand, three hundred ten".