120121200126 has 64 divisors (see below), whose sum is σ = 273310583040. Its totient is φ = 39085351200.

The previous prime is 120121200107. The next prime is 120121200127. The reversal of 120121200126 is 621002121021.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 120121200099 and 120121200108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120121200127) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4009101 + ... + 4038951.

It is an arithmetic number, because the mean of its divisors is an integer number (4270477860).

Almost surely, 2^120121200126 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 120121200126, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (136655291520).

120121200126 is an abundant number, since it is smaller than the sum of its proper divisors (153189382914).

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

120121200126 is a wasteful number, since it uses less digits than its factorization.

120121200126 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31638 (or 31632 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 120121200126 its reverse (621002121021), we get a palindrome (741123321147).

The spelling of 120121200126 in words is "one hundred twenty billion, one hundred twenty-one million, two hundred thousand, one hundred twenty-six".