122021756712 has 96 divisors (see below), whose sum is σ = 337935780000. Its totient is φ = 39763370880.

The previous prime is 122021756657. The next prime is 122021756713. The reversal of 122021756712 is 217657120221.

It is a super-2 number, since 2×122021756712² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (122021756713) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 689539 + ... + 848237.

It is an arithmetic number, because the mean of its divisors is an integer number (3520164375).

Almost surely, 2^122021756712 is an apocalyptic number.

122021756712 is a gapful number since it is divisible by the number (12) 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 122021756712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (168967890000).

122021756712 is an abundant number, since it is smaller than the sum of its proper divisors (215914023288).

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

122021756712 is a wasteful number, since it uses less digits than its factorization.

122021756712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158951 (or 158944 counting only the distinct ones).

The product of its (nonzero) digits is 23520, while the sum is 36.

Adding to 122021756712 its reverse (217657120221), we get a palindrome (339678876933).

The spelling of 122021756712 in words is "one hundred twenty-two billion, twenty-one million, seven hundred fifty-six thousand, seven hundred twelve".