121132112021 has 4 divisors (see below), whose sum is σ = 121133254944. Its totient is φ = 121130969100.

The previous prime is 121132112011. The next prime is 121132112033. The reversal of 121132112021 is 120211231121.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 120211231121 = 6733 ⋅17854037.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121132112021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121132112011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 394145 + ... + 630566.

It is an arithmetic number, because the mean of its divisors is an integer number (30283313736).

Almost surely, 2^121132112021 is an apocalyptic number.

It is an amenable number.

121132112021 is a deficient number, since it is larger than the sum of its proper divisors (1142923).

121132112021 is a wasteful number, since it uses less digits than its factorization.

121132112021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1142922.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 121132112021 its reverse (120211231121), we get a palindrome (241343343142).

The spelling of 121132112021 in words is "one hundred twenty-one billion, one hundred thirty-two million, one hundred twelve thousand, twenty-one".