1200121121120 has 48 divisors (see below), whose sum is σ = 2835795378528. Its totient is φ = 479962229760.

The previous prime is 1200121121119. The next prime is 1200121121237. The reversal of 1200121121120 is 211211210021.

It is a junction number, because it is equal to n+sod(n) for n = 1200121121095 and 1200121121104.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 223772 + ... + 1565348.

It is an arithmetic number, because the mean of its divisors is an integer number (59079070386).

Almost surely, 2^{1200121121120} is an apocalyptic number.

1200121121120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1200121121120 is an abundant number, since it is smaller than the sum of its proper divisors (1635674257408).

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

1200121121120 is a wasteful number, since it uses less digits than its factorization.

1200121121120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1347183 (or 1347175 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 1200121121120 its reverse (211211210021), we get a palindrome (1411332331141).

The spelling of 1200121121120 in words is "one trillion, two hundred billion, one hundred twenty-one million, one hundred twenty-one thousand, one hundred twenty".