121033131021 has 24 divisors (see below), whose sum is σ = 191033167104. Its totient is φ = 73232530560.

The previous prime is 121033131017. The next prime is 121033131041. The reversal of 121033131021 is 120131330121.

121033131021 is a `hidden beast` number, since 1 + 2 + 1 + 0 + 331 + 310 + 21 = 666.

It is not a de Polignac number, because 121033131021 - 2² = 121033131017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121033130985 and 121033131003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121033131041) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 946956 + ... + 1067141.

It is an arithmetic number, because the mean of its divisors is an integer number (7959715296).

Almost surely, 2^121033131021 is an apocalyptic number.

121033131021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

121033131021 is a deficient number, since it is larger than the sum of its proper divisors (70000036083).

121033131021 is a wasteful number, since it uses less digits than its factorization.

121033131021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2014721 (or 2014718 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

Adding to 121033131021 its reverse (120131330121), we get a palindrome (241164461142).

Subtracting from 121033131021 its reverse (120131330121), we obtain a square (901800900 = 30030²).

The spelling of 121033131021 in words is "one hundred twenty-one billion, thirty-three million, one hundred thirty-one thousand, twenty-one".