1200211022021 has 16 divisors (see below), whose sum is σ = 1397112671040. Its totient is φ = 1019514625920.

The previous prime is 1200211022009. The next prime is 1200211022033. The reversal of 1200211022021 is 1202201120021.

It is an interprime number because it is at equal distance from previous prime (1200211022009) and next prime (1200211022033).

It is a cyclic number.

It is not a de Polignac number, because 1200211022021 - 2²² = 1200206827717 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1200211021987 and 1200211022005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200211022221) 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 15 ways as a sum of consecutive naturals, for example, 39317870 + ... + 39348383.

It is an arithmetic number, because the mean of its divisors is an integer number (87319541940).

Almost surely, 2^{1200211022021} is an apocalyptic number.

1200211022021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1200211022021 is a deficient number, since it is larger than the sum of its proper divisors (196901649019).

1200211022021 is a wasteful number, since it uses less digits than its factorization.

1200211022021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78666356.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 1200211022021 its reverse (1202201120021), we get a palindrome (2402412142042).

The spelling of 1200211022021 in words is "one trillion, two hundred billion, two hundred eleven million, twenty-two thousand, twenty-one".