1101202021121 has 4 divisors (see below), whose sum is σ = 1128060607044. Its totient is φ = 1074343435200.

The previous prime is 1101202021111. The next prime is 1101202021141. The reversal of 1101202021121 is 1211202021011.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 386027358721 + 715174662400 = 621311^2 + 845680^2 .

It is a cyclic number.

It is not a de Polignac number, because 1101202021121 - 2⁶ = 1101202021057 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1101202021096 and 1101202021105.

It is not an unprimeable number, because it can be changed into a prime (1101202021111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13429292900 + ... + 13429292981.

It is an arithmetic number, because the mean of its divisors is an integer number (282015151761).

Almost surely, 2^{1101202021121} is an apocalyptic number.

It is an amenable number.

1101202021121 is a deficient number, since it is larger than the sum of its proper divisors (26858585923).

1101202021121 is an equidigital number, since it uses as much as digits as its factorization.

1101202021121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26858585922.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 1101202021121 its reverse (1211202021011), we get a palindrome (2312404042132).

The spelling of 1101202021121 in words is "one trillion, one hundred one billion, two hundred two million, twenty-one thousand, one hundred twenty-one".