121121211102 has 32 divisors (see below), whose sum is σ = 256814997504. Its totient is φ = 38015373600.

The previous prime is 121121211083. The next prime is 121121211103. The reversal of 121121211102 is 201112121121.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121121211103) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8792974 + ... + 8806737.

It is an arithmetic number, because the mean of its divisors is an integer number (8025468672).

Almost surely, 2^121121211102 is an apocalyptic number.

121121211102 is an abundant number, since it is smaller than the sum of its proper divisors (135693786402).

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

121121211102 is a wasteful number, since it uses less digits than its factorization.

121121211102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17599784.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 121121211102 its reverse (201112121121), we get a palindrome (322233332223).

The spelling of 121121211102 in words is "one hundred twenty-one billion, one hundred twenty-one million, two hundred eleven thousand, one hundred two".