121111021122220 has 24 divisors (see below), whose sum is σ = 256274618746608. Its totient is φ = 48074603803200.

The previous prime is 121111021122197. The next prime is 121111021122251. The reversal of 121111021122220 is 22221120111121.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23112787671 + ... + 23112792910.

It is an arithmetic number, because the mean of its divisors is an integer number (10678109114442).

Almost surely, 2^{121111021122220} is an apocalyptic number.

121111021122220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121111021122220 is an abundant number, since it is smaller than the sum of its proper divisors (135163597624388).

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

121111021122220 is a wasteful number, since it uses less digits than its factorization.

121111021122220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46225580721 (or 46225580719 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 121111021122220 its reverse (22221120111121), we get a palindrome (143332141233341).

The spelling of 121111021122220 in words is "one hundred twenty-one trillion, one hundred eleven billion, twenty-one million, one hundred twenty-two thousand, two hundred twenty".