11211212121110 has 16 divisors (see below), whose sum is σ = 20256912552096. Its totient is φ = 4467433574208.

The previous prime is 11211212121097. The next prime is 11211212121163. The reversal of 11211212121110 is 1112121211211.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2131406519 + ... + 2131411778.

It is an arithmetic number, because the mean of its divisors is an integer number (1266057034506).

Almost surely, 2^{11211212121110} is an apocalyptic number.

11211212121110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11211212121110 is a deficient number, since it is larger than the sum of its proper divisors (9045700430986).

11211212121110 is a wasteful number, since it uses less digits than its factorization.

11211212121110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4262818567.

The product of its (nonzero) digits is 16, while the sum is 17.

Adding to 11211212121110 its reverse (1112121211211), we get a palindrome (12323333332321).

The spelling of 11211212121110 in words is "eleven trillion, two hundred eleven billion, two hundred twelve million, one hundred twenty-one thousand, one hundred ten".