2120423120040 has 64 divisors (see below), whose sum is σ = 6364246858560. Its totient is φ = 565181498880.

The previous prime is 2120423120033. The next prime is 2120423120099. The reversal of 2120423120040 is 400213240212.

It is a junction number, because it is equal to n+sod(n) for n = 2120423119989 and 2120423120016.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3877906 + ... + 4390785.

It is an arithmetic number, because the mean of its divisors is an integer number (99441357165).

Almost surely, 2^{2120423120040} is an apocalyptic number.

2120423120040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2120423120040 is an abundant number, since it is smaller than the sum of its proper divisors (4243823738520).

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

2120423120040 is a wasteful number, since it uses less digits than its factorization.

2120423120040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8270842 (or 8270838 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

Adding to 2120423120040 its reverse (400213240212), we get a palindrome (2520636360252).

The spelling of 2120423120040 in words is "two trillion, one hundred twenty billion, four hundred twenty-three million, one hundred twenty thousand, forty".