122421000000000 has 1600 divisors, whose sum is σ = 455394797117568. Its totient is φ = 29030400000000.

The previous prime is 122420999999993. The next prime is 122421000000029. The reversal of 122421000000000 is 124221.

It is a tau number, because it is divible by the number of its divisors (1600).

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 1676999999964 + ... + 1677000000036.

Almost surely, 2^{122421000000000} is an apocalyptic number.

122421000000000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 122421000000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (227697398558784).

122421000000000 is an abundant number, since it is smaller than the sum of its proper divisors (332973797117568).

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

122421000000000 is an frugal number, since it uses more digits than its factorization.

122421000000000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195 (or 139 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 122421000000000 its reverse (124221), we get a palindrome (122421000124221).

The spelling of 122421000000000 in words is "one hundred twenty-two trillion, four hundred twenty-one billion", and thus it is an aban number.