20121132021 has 16 divisors (see below), whose sum is σ = 28041256320. Its totient is φ = 12809491200.

The previous prime is 20121132013. The next prime is 20121132121. The reversal of 20121132021 is 12023112102.

It is not a de Polignac number, because 20121132021 - 2³ = 20121132013 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20121132121) 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 15 ways as a sum of consecutive naturals, for example, 201136 + ... + 284073.

It is an arithmetic number, because the mean of its divisors is an integer number (1752578520).

Almost surely, 2^20121132021 is an apocalyptic number.

It is an amenable number.

20121132021 is a deficient number, since it is larger than the sum of its proper divisors (7920124299).

20121132021 is a wasteful number, since it uses less digits than its factorization.

20121132021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 485836.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 20121132021 its reverse (12023112102), we get a palindrome (32144244123).

The spelling of 20121132021 in words is "twenty billion, one hundred twenty-one million, one hundred thirty-two thousand, twenty-one".