122121120020 has 12 divisors (see below), whose sum is σ = 256454352084. Its totient is φ = 48848448000.

The previous prime is 122121120019. The next prime is 122121120029. The reversal of 122121120020 is 20021121221.

It can be written as a sum of positive squares in 2 ways, for example, as 36727422736 + 85393697284 = 191644^2 + 292222^2 .

It is a junction number, because it is equal to n+sod(n) for n = 122121119977 and 122121120004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122121120029) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3053027981 + ... + 3053028020.

It is an arithmetic number, because the mean of its divisors is an integer number (21371196007).

Almost surely, 2^122121120020 is an apocalyptic number.

122121120020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

122121120020 is an abundant number, since it is smaller than the sum of its proper divisors (134333232064).

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

122121120020 is a wasteful number, since it uses less digits than its factorization.

122121120020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6106056010 (or 6106056008 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 122121120020 its reverse (20021121221), we get a palindrome (142142241241).

The spelling of 122121120020 in words is "one hundred twenty-two billion, one hundred twenty-one million, one hundred twenty thousand, twenty".