1121211202021 has 4 divisors (see below), whose sum is σ = 1157379305344. Its totient is φ = 1085043098700.

The previous prime is 1121211201977. The next prime is 1121211202063. The reversal of 1121211202021 is 1202021121211.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1121211202021 - 2⁷ = 1121211201893 is a prime.

It is a super-2 number, since 2×1121211202021² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1121211201986 and 1121211202004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121211202621) 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 3 ways as a sum of consecutive naturals, for example, 18084051615 + ... + 18084051676.

It is an arithmetic number, because the mean of its divisors is an integer number (289344826336).

Almost surely, 2^{1121211202021} is an apocalyptic number.

It is an amenable number.

1121211202021 is a deficient number, since it is larger than the sum of its proper divisors (36168103323).

1121211202021 is an equidigital number, since it uses as much as digits as its factorization.

1121211202021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36168103322.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 1121211202021 its reverse (1202021121211), we get a palindrome (2323232323232).

The spelling of 1121211202021 in words is "one trillion, one hundred twenty-one billion, two hundred eleven million, two hundred two thousand, twenty-one".