1202111211021 has 24 divisors (see below), whose sum is σ = 1914894246720. Its totient is φ = 657054568896.

The previous prime is 1202111211011. The next prime is 1202111211079. The reversal of 1202111211021 is 1201121112021.

It is a happy number.

It is not a de Polignac number, because 1202111211021 - 2¹⁰ = 1202111209997 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1202111211001) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 54094176 + ... + 54116393.

It is an arithmetic number, because the mean of its divisors is an integer number (79787260280).

Almost surely, 2^{1202111211021} is an apocalyptic number.

It is an amenable number.

1202111211021 is a deficient number, since it is larger than the sum of its proper divisors (712783035699).

1202111211021 is a wasteful number, since it uses less digits than its factorization.

1202111211021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108210625 (or 108210602 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 1202111211021 its reverse (1201121112021), we get a palindrome (2403232323042).

The spelling of 1202111211021 in words is "one trillion, two hundred two billion, one hundred eleven million, two hundred eleven thousand, twenty-one".