1121131212021 has 32 divisors (see below), whose sum is σ = 1684740695040. Its totient is φ = 736713457200.

The previous prime is 1121131212007. The next prime is 1121131212023. The reversal of 1121131212021 is 1202121311211.

It is a happy number.

1121131212021 is a `hidden beast` number, since 1 + 1 + 211 + 312 + 120 + 21 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-1121131212021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1121131211985 and 1121131212003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121131212023) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8003046 + ... + 8141928.

It is an arithmetic number, because the mean of its divisors is an integer number (52648146720).

Almost surely, 2^{1121131212021} is an apocalyptic number.

It is an amenable number.

1121131212021 is a deficient number, since it is larger than the sum of its proper divisors (563609483019).

1121131212021 is a wasteful number, since it uses less digits than its factorization.

1121131212021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143174 (or 143168 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 18.

Adding to 1121131212021 its reverse (1202121311211), we get a palindrome (2323252523232).

The spelling of 1121131212021 in words is "one trillion, one hundred twenty-one billion, one hundred thirty-one million, two hundred twelve thousand, twenty-one".