1200120021110 has 16 divisors (see below), whose sum is σ = 2161251157536. Its totient is φ = 479817981888.

The previous prime is 1200120021109. The next prime is 1200120021157. The reversal of 1200120021110 is 111200210021.

It is a junction number, because it is equal to n+sod(n) for n = 1200120021091 and 1200120021100.

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, 28731407 + ... + 28773146.

It is an arithmetic number, because the mean of its divisors is an integer number (135078197346).

Almost surely, 2^{1200120021110} is an apocalyptic number.

1200120021110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1200120021110 is a deficient number, since it is larger than the sum of its proper divisors (961131136426).

1200120021110 is a wasteful number, since it uses less digits than its factorization.

1200120021110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57506647.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 1200120021110 its reverse (111200210021), we get a palindrome (1311320231131).

The spelling of 1200120021110 in words is "one trillion, two hundred billion, one hundred twenty million, twenty-one thousand, one hundred ten".