122986921860 has 672 divisors, whose sum is σ = 451626900480. Its totient is φ = 27825638400.

The previous prime is 122986921847. The next prime is 122986921901. The reversal of 122986921860 is 68129689221.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a junction number, because it is equal to n+sod(n) for n = 122986921797 and 122986921806.

It is an unprimeable number.

It is a polite number, since it can be written in 223 ways as a sum of consecutive naturals, for example, 144181194 + ... + 144182046.

It is an arithmetic number, because the mean of its divisors is an integer number (672063840).

Almost surely, 2^122986921860 is an apocalyptic number.

122986921860 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 122986921860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (225813450240).

122986921860 is an abundant number, since it is smaller than the sum of its proper divisors (328639978620).

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

122986921860 is a wasteful number, since it uses less digits than its factorization.

122986921860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 951 (or 934 counting only the distinct ones).

The product of its (nonzero) digits is 1492992, while the sum is 54.

The spelling of 122986921860 in words is "one hundred twenty-two billion, nine hundred eighty-six million, nine hundred twenty-one thousand, eight hundred sixty".