11212121103 has 8 divisors (see below), whose sum is σ = 15736310400. Its totient is φ = 7081339608.

The previous prime is 11212121101. The next prime is 11212121113. The reversal of 11212121103 is 30112121211.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 11212121103 - 2¹ = 11212121101 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11212121101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 98351883 + ... + 98351996.

It is an arithmetic number, because the mean of its divisors is an integer number (1967038800).

Almost surely, 2^11212121103 is an apocalyptic number.

11212121103 is a deficient number, since it is larger than the sum of its proper divisors (4524189297).

11212121103 is a wasteful number, since it uses less digits than its factorization.

11212121103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196703901.

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 11212121103 its reverse (30112121211), we get a palindrome (41324242314).

The spelling of 11212121103 in words is "eleven billion, two hundred twelve million, one hundred twenty-one thousand, one hundred three".