11212121102 has 48 divisors (see below), whose sum is σ = 21107323440. Its totient is φ = 4427482752.

The previous prime is 11212121101. The next prime is 11212121113. The reversal of 11212121102 is 20112121211.

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

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 23 ways as a sum of consecutive naturals, for example, 717173 + ... + 732639.

It is an arithmetic number, because the mean of its divisors is an integer number (439735905).

Almost surely, 2^11212121102 is an apocalyptic number.

11212121102 is a deficient number, since it is larger than the sum of its proper divisors (9895202338).

11212121102 is a wasteful number, since it uses less digits than its factorization.

11212121102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16065 (or 16058 counting only the distinct ones).

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

Adding to 11212121102 its reverse (20112121211), we get a palindrome (31324242313).

The spelling of 11212121102 in words is "eleven billion, two hundred twelve million, one hundred twenty-one thousand, one hundred two".