11211212111120 has 80 divisors (see below), whose sum is σ = 31542132924288. Its totient is φ = 3617735669760.

The previous prime is 11211212111111. The next prime is 11211212111131. The reversal of 11211212111120 is 2111121211211.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (17).

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, 588814646 + ... + 588833685.

Almost surely, 2^{11211212111120} is an apocalyptic number.

11211212111120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11211212111120 is an abundant number, since it is smaller than the sum of its proper divisors (20330920813168).

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

11211212111120 is a wasteful number, since it uses less digits than its factorization.

11211212111120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1177648368 (or 1177648362 counting only the distinct ones).

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

Adding to 11211212111120 its reverse (2111121211211), we get a palindrome (13322333322331).

The spelling of 11211212111120 in words is "eleven trillion, two hundred eleven billion, two hundred twelve million, one hundred eleven thousand, one hundred twenty".