11121212221210 has 64 divisors (see below), whose sum is σ = 24640327982592. Its totient is φ = 3519313848576.

The previous prime is 11121212221193. The next prime is 11121212221237. The reversal of 11121212221210 is 1212221212111.

It is a happy number.

It is a super-2 number, since 2×11121212221210² (a number of 27 digits) contains 22 as substring.

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, 8174619 + ... + 9437521.

It is an arithmetic number, because the mean of its divisors is an integer number (385005124728).

Almost surely, 2^{11121212221210} is an apocalyptic number.

11121212221210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11121212221210 is an abundant number, since it is smaller than the sum of its proper divisors (13519115761382).

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

11121212221210 is a wasteful number, since it uses less digits than its factorization.

11121212221210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1272607.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 11121212221210 its reverse (1212221212111), we get a palindrome (12333433433321).

The spelling of 11121212221210 in words is "eleven trillion, one hundred twenty-one billion, two hundred twelve million, two hundred twenty-one thousand, two hundred ten".