11101221021210 has 64 divisors (see below), whose sum is σ = 28949873541120. Its totient is φ = 2714050635840.

The previous prime is 11101221021203. The next prime is 11101221021223. The reversal of 11101221021210 is 1212012210111.

It is a happy number.

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 11101221021210.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 314108562 + ... + 314143901.

It is an arithmetic number, because the mean of its divisors is an integer number (452341774080).

Almost surely, 2^{11101221021210} is an apocalyptic number.

11101221021210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11101221021210 is an abundant number, since it is smaller than the sum of its proper divisors (17848652519910).

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

11101221021210 is a wasteful number, since it uses less digits than its factorization.

11101221021210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 628252523.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 11101221021210 its reverse (1212012210111), we get a palindrome (12313233231321).

The spelling of 11101221021210 in words is "eleven trillion, one hundred one billion, two hundred twenty-one million, twenty-one thousand, two hundred ten".