121112221221020 has 96 divisors (see below), whose sum is σ = 280386634752000. Its totient is φ = 43788776455424.

The previous prime is 121112221221001. The next prime is 121112221221083. The reversal of 121112221221020 is 20122122211121.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 121112221220983 and 121112221221001.

It is a congruent 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, 95956820 + ... + 97210779.

It is an arithmetic number, because the mean of its divisors is an integer number (2920694112000).

Almost surely, 2^{121112221221020} is an apocalyptic number.

121112221221020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121112221221020 is an abundant number, since it is smaller than the sum of its proper divisors (159274413530980).

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

121112221221020 is a wasteful number, since it uses less digits than its factorization.

121112221221020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193167707 (or 193167705 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 121112221221020 its reverse (20122122211121), we get a palindrome (141234343432141).

The spelling of 121112221221020 in words is "one hundred twenty-one trillion, one hundred twelve billion, two hundred twenty-one million, two hundred twenty-one thousand, twenty".