120012020109978 has 32 divisors (see below), whose sum is σ = 240648584155584. Its totient is φ = 39899932756992.

The previous prime is 120012020109941. The next prime is 120012020109983. The reversal of 120012020109978 is 879901020210021.

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, 26732601 + ... + 30897507.

It is an arithmetic number, because the mean of its divisors is an integer number (7520268254862).

Almost surely, 2^{120012020109978} is an apocalyptic number.

120012020109978 is an abundant number, since it is smaller than the sum of its proper divisors (120636564045606).

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

120012020109978 is a wasteful number, since it uses less digits than its factorization.

120012020109978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4177406.

The product of its (nonzero) digits is 36288, while the sum is 42.

Adding to 120012020109978 its reverse (879901020210021), we get a palindrome (999913040319999).

The spelling of 120012020109978 in words is "one hundred twenty trillion, twelve billion, twenty million, one hundred nine thousand, nine hundred seventy-eight".