121111021122 has 64 divisors (see below), whose sum is σ = 298409422080. Its totient is φ = 31910298624.

The previous prime is 121111021093. The next prime is 121111021147. The reversal of 121111021122 is 221120111121.

It is a happy 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, 456654 + ... + 671382.

It is an arithmetic number, because the mean of its divisors is an integer number (4662647220).

Almost surely, 2^121111021122 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121111021122, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (149204711040).

121111021122 is an abundant number, since it is smaller than the sum of its proper divisors (177298400958).

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

121111021122 is a wasteful number, since it uses less digits than its factorization.

121111021122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215787.

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

Adding to 121111021122 its reverse (221120111121), we get a palindrome (342231132243).

The spelling of 121111021122 in words is "one hundred twenty-one billion, one hundred eleven million, twenty-one thousand, one hundred twenty-two".