1211102013021 has 32 divisors (see below), whose sum is σ = 1654979788800. Its totient is φ = 787539775680.

The previous prime is 1211102012993. The next prime is 1211102013053. The reversal of 1211102013021 is 1203102011121.

It is not a de Polignac number, because 1211102013021 - 2⁷ = 1211102012893 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211102013071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 54349560 + ... + 54371838.

It is an arithmetic number, because the mean of its divisors is an integer number (51718118400).

Almost surely, 2^{1211102013021} is an apocalyptic number.

It is an amenable number.

1211102013021 is a deficient number, since it is larger than the sum of its proper divisors (443877775779).

1211102013021 is a wasteful number, since it uses less digits than its factorization.

1211102013021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24809.

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 1211102013021 its reverse (1203102011121), we get a palindrome (2414204024142).

The spelling of 1211102013021 in words is "one trillion, two hundred eleven billion, one hundred two million, thirteen thousand, twenty-one".