1200021112010 has 64 divisors (see below), whose sum is σ = 2563466863104. Its totient is φ = 395902080000.

The previous prime is 1200021111973. The next prime is 1200021112019. The reversal of 1200021112010 is 102111200021.

It is a junction number, because it is equal to n+sod(n) for n = 1200021111982 and 1200021112000.

It is not an unprimeable number, because it can be changed into a prime (1200021112019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2654366 + ... + 3073385.

It is an arithmetic number, because the mean of its divisors is an integer number (40054169736).

Almost surely, 2^{1200021112010} is an apocalyptic number.

1200021112010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1200021112010 is an abundant number, since it is smaller than the sum of its proper divisors (1363445751094).

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

1200021112010 is a wasteful number, since it uses less digits than its factorization.

1200021112010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5727879.

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

Adding to 1200021112010 its reverse (102111200021), we get a palindrome (1302132312031).

The spelling of 1200021112010 in words is "one trillion, two hundred billion, twenty-one million, one hundred twelve thousand, ten".