1200211011021 has 32 divisors (see below), whose sum is σ = 1793206597248. Its totient is φ = 707637565440.

The previous prime is 1200211011007. The next prime is 1200211011029. The reversal of 1200211011021 is 1201101120021.

It is not a de Polignac number, because 1200211011021 - 2¹⁰ = 1200211009997 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1200211010988 and 1200211011006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200211011029) 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, 8714325 + ... + 8850981.

It is an arithmetic number, because the mean of its divisors is an integer number (56037706164).

Almost surely, 2^{1200211011021} is an apocalyptic number.

1200211011021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1200211011021 is a deficient number, since it is larger than the sum of its proper divisors (592995586227).

1200211011021 is a wasteful number, since it uses less digits than its factorization.

1200211011021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143901.

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

Adding to 1200211011021 its reverse (1201101120021), we get a palindrome (2401312131042).

The spelling of 1200211011021 in words is "one trillion, two hundred billion, two hundred eleven million, eleven thousand, twenty-one".