122121111211220 has 48 divisors (see below), whose sum is σ = 282911828673600. Its totient is φ = 43908714136320.

The previous prime is 122121111211199. The next prime is 122121111211279. The reversal of 122121111211220 is 22112111121221.

It is a happy number.

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 = 122121111211192 and 122121111211201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3118497050 + ... + 3118536209.

It is an arithmetic number, because the mean of its divisors is an integer number (5893996430700).

Almost surely, 2^{122121111211220} is an apocalyptic number.

122121111211220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

122121111211220 is an abundant number, since it is smaller than the sum of its proper divisors (160790717462380).

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

122121111211220 is a wasteful number, since it uses less digits than its factorization.

122121111211220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6237033368 (or 6237033366 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 20.

Adding to 122121111211220 its reverse (22112111121221), we get a palindrome (144233222332441).

The spelling of 122121111211220 in words is "one hundred twenty-two trillion, one hundred twenty-one billion, one hundred eleven million, two hundred eleven thousand, two hundred twenty".