120021400043 has 12 divisors (see below), whose sum is σ = 129707271408. Its totient is φ = 110844333600.

The previous prime is 120021400039. The next prime is 120021400049. The reversal of 120021400043 is 340004120021.

It is not a de Polignac number, because 120021400043 - 2² = 120021400039 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 120021399994 and 120021400030.

It is not an unprimeable number, because it can be changed into a prime (120021400049) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3083108 + ... + 3121793.

It is an arithmetic number, because the mean of its divisors is an integer number (10808939284).

Almost surely, 2^120021400043 is an apocalyptic number.

120021400043 is a deficient number, since it is larger than the sum of its proper divisors (9685871365).

120021400043 is an equidigital number, since it uses as much as digits as its factorization.

120021400043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6204982 (or 6204953 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 120021400043 its reverse (340004120021), we get a palindrome (460025520064).

The spelling of 120021400043 in words is "one hundred twenty billion, twenty-one million, four hundred thousand, forty-three".