20121120102021 has 32 divisors (see below), whose sum is σ = 28290804090240. Its totient is φ = 12685296605184.

The previous prime is 20121120101941. The next prime is 20121120102037. The reversal of 20121120102021 is 12020102112102.

It is not a de Polignac number, because 20121120102021 - 2³¹ = 20118972618373 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20121110102021) 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, 233118145 + ... + 233204441.

It is an arithmetic number, because the mean of its divisors is an integer number (884087627820).

Almost surely, 2^{20121120102021} is an apocalyptic number.

It is an amenable number.

20121120102021 is a deficient number, since it is larger than the sum of its proper divisors (8169683988219).

20121120102021 is a wasteful number, since it uses less digits than its factorization.

20121120102021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93605.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 20121120102021 its reverse (12020102112102), we get a palindrome (32141222214123).

The spelling of 20121120102021 in words is "twenty trillion, one hundred twenty-one billion, one hundred twenty million, one hundred two thousand, twenty-one".