1202020021111 has 48 divisors (see below), whose sum is σ = 1520732537856. Its totient is φ = 941644799424.

The previous prime is 1202020021099. The next prime is 1202020021129. The reversal of 1202020021111 is 1111200202021.

It is not a de Polignac number, because 1202020021111 - 2⁷ = 1202020020983 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a junction number, because it is equal to n+sod(n) for n = 1202020021091 and 1202020021100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1202020024111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 166781470 + ... + 166788676.

It is an arithmetic number, because the mean of its divisors is an integer number (31681927872).

Almost surely, 2^{1202020021111} is an apocalyptic number.

1202020021111 is a deficient number, since it is larger than the sum of its proper divisors (318712516745).

1202020021111 is a wasteful number, since it uses less digits than its factorization.

1202020021111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9788 (or 9781 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 1202020021111 its reverse (1111200202021), we get a palindrome (2313220223132).

The spelling of 1202020021111 in words is "one trillion, two hundred two billion, twenty million, twenty-one thousand, one hundred eleven".