1200021121011 has 32 divisors (see below), whose sum is σ = 1711111046400. Its totient is φ = 745903503360.

The previous prime is 1200021121007. The next prime is 1200021121051. The reversal of 1200021121011 is 1101211200021.

It is not a de Polignac number, because 1200021121011 - 2² = 1200021121007 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1200021121051) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 383431 + ... + 1595951.

It is an arithmetic number, because the mean of its divisors is an integer number (53472220200).

Almost surely, 2^{1200021121011} is an apocalyptic number.

1200021121011 is a deficient number, since it is larger than the sum of its proper divisors (511089925389).

1200021121011 is a wasteful number, since it uses less digits than its factorization.

1200021121011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1212819.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 1200021121011 its reverse (1101211200021), we get a palindrome (2301232321032).

The spelling of 1200021121011 in words is "one trillion, two hundred billion, twenty-one million, one hundred twenty-one thousand, eleven".