1200021121211 has 16 divisors (see below), whose sum is σ = 1366762595328. Its totient is φ = 1042938494400.

The previous prime is 1200021121147. The next prime is 1200021121259. The reversal of 1200021121211 is 1121211200021.

It is not a de Polignac number, because 1200021121211 - 2⁶ = 1200021121147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1200020121211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 794186 + ... + 1740911.

It is an arithmetic number, because the mean of its divisors is an integer number (85422662208).

Almost surely, 2^{1200021121211} is an apocalyptic number.

1200021121211 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1200021121211 is a deficient number, since it is larger than the sum of its proper divisors (166741474117).

1200021121211 is a wasteful number, since it uses less digits than its factorization.

1200021121211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2537002.

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

Adding to 1200021121211 its reverse (1121211200021), we get a palindrome (2321232321232).

The spelling of 1200021121211 in words is "one trillion, two hundred billion, twenty-one million, one hundred twenty-one thousand, two hundred eleven".