11121212102 has 64 divisors (see below), whose sum is σ = 22420468224. Its totient is φ = 3995619840.

The previous prime is 11121211987. The next prime is 11121212153. The reversal of 11121212102 is 20121212111.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a congruent number.

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, 2594453 + ... + 2598735.

It is an arithmetic number, because the mean of its divisors is an integer number (350319816).

Almost surely, 2^11121212102 is an apocalyptic number.

11121212102 is an abundant number, since it is smaller than the sum of its proper divisors (11299256122).

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

11121212102 is a wasteful number, since it uses less digits than its factorization.

11121212102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5613.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 11121212102 its reverse (20121212111), we get a palindrome (31242424213).

Subtracting 11121212102 from its reverse (20121212111), we obtain a palindrome (9000000009).

The spelling of 11121212102 in words is "eleven billion, one hundred twenty-one million, two hundred twelve thousand, one hundred two".