122222121012020 has 48 divisors (see below), whose sum is σ = 259209855647568. Its totient is φ = 48404399001600.

The previous prime is 122222121012011. The next prime is 122222121012049. The reversal of 122222121012020 is 20210121222221.

It can be written as a sum of positive squares in 8 ways, for example, as 2183408148496 + 120038712863524 = 1477636^2 + 10956218^2 .

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 = 122222121011983 and 122222121012001.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 406995044 + ... + 407295236.

It is an arithmetic number, because the mean of its divisors is an integer number (5400205325991).

Almost surely, 2^{122222121012020} is an apocalyptic number.

122222121012020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

122222121012020 is an abundant number, since it is smaller than the sum of its proper divisors (136987734635548).

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

122222121012020 is a wasteful number, since it uses less digits than its factorization.

122222121012020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 501860 (or 501858 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 122222121012020 its reverse (20210121222221), we get a palindrome (142432242234241).

The spelling of 122222121012020 in words is "one hundred twenty-two trillion, two hundred twenty-two billion, one hundred twenty-one million, twelve thousand, twenty".