11121221010 has 32 divisors (see below), whose sum is σ = 26838407232. Its totient is φ = 2949272640.

The previous prime is 11121221003. The next prime is 11121221029. The reversal of 11121221010 is 1012212111.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1018624 + ... + 1029483.

It is an arithmetic number, because the mean of its divisors is an integer number (838700226).

Almost surely, 2^11121221010 is an apocalyptic number.

11121221010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11121221010 is an abundant number, since it is smaller than the sum of its proper divisors (15717186222).

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

11121221010 is a wasteful number, since it uses less digits than its factorization.

11121221010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2048298.

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

Adding to 11121221010 its reverse (1012212111), we get a palindrome (12133433121).

The spelling of 11121221010 in words is "eleven billion, one hundred twenty-one million, two hundred twenty-one thousand, ten".