121334420020 has 48 divisors (see below), whose sum is σ = 278290152000. Its totient is φ = 44070174720.

The previous prime is 121334419981. The next prime is 121334420021. The reversal of 121334420020 is 20024433121.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 121334419973 and 121334420000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121334420021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 132045 + ... + 510004.

It is an arithmetic number, because the mean of its divisors is an integer number (5797711500).

Almost surely, 2^121334420020 is an apocalyptic number.

121334420020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121334420020 is an abundant number, since it is smaller than the sum of its proper divisors (156955731980).

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

121334420020 is a wasteful number, since it uses less digits than its factorization.

121334420020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 642928 (or 642926 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 121334420020 its reverse (20024433121), we get a palindrome (141358853141).

The spelling of 121334420020 in words is "one hundred twenty-one billion, three hundred thirty-four million, four hundred twenty thousand, twenty".