120012312121100 has 36 divisors (see below), whose sum is σ = 297630534062064. Its totient is φ = 41147078441280.

The previous prime is 120012312121087. The next prime is 120012312121111. The reversal of 120012312121100 is 1121213210021.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 85723079387 + ... + 85723080786.

Almost surely, 2^{120012312121100} is an apocalyptic number.

120012312121100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

120012312121100 is an abundant number, since it is smaller than the sum of its proper divisors (177618221940964).

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

120012312121100 is a wasteful number, since it uses less digits than its factorization.

120012312121100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171446160194 (or 171446160187 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 120012312121100 its reverse (1121213210021), we get a palindrome (121133525331121).

The spelling of 120012312121100 in words is "one hundred twenty trillion, twelve billion, three hundred twelve million, one hundred twenty-one thousand, one hundred".