122021000000 has 98 divisors (see below), whose sum is σ = 302667883614. Its totient is φ = 48808000000.

The previous prime is 122020999999. The next prime is 122021000027. The reversal of 122021000000 is 120221.

It can be written as a sum of positive squares in 7 ways, for example, as 120292436224 + 1728563776 = 346832^2 + 41576^2 .

It is a Harshad number since it is a multiple of its sum of digits (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 938990 + ... + 1061010.

Almost surely, 2^122021000000 is an apocalyptic number.

122021000000 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 122021000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (151333941807).

122021000000 is an abundant number, since it is smaller than the sum of its proper divisors (180646883614).

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

122021000000 is an frugal number, since it uses more digits than its factorization.

122021000000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122063 (or 122028 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 8.

Adding to 122021000000 its reverse (120221), we get a palindrome (122021120221).

The spelling of 122021000000 in words is "one hundred twenty-two billion, twenty-one million", and thus it is an aban number.