20112101212021 has 24 divisors (see below), whose sum is σ = 25636352653184. Its totient is φ = 15364151530560.

The previous prime is 20112101211971. The next prime is 20112101212033. The reversal of 20112101212021 is 12021210121102.

It is not a de Polignac number, because 20112101212021 - 2¹⁵ = 20112101179253 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20112101211986 and 20112101212004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20112101212061) 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, 131321865 + ... + 131474926.

Almost surely, 2^{20112101212021} is an apocalyptic number.

It is an amenable number.

20112101212021 is a deficient number, since it is larger than the sum of its proper divisors (5524251441163).

20112101212021 is a wasteful number, since it uses less digits than its factorization.

20112101212021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 262796869 (or 262796840 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 20112101212021 its reverse (12021210121102), we get a palindrome (32133311333123).

The spelling of 20112101212021 in words is "twenty trillion, one hundred twelve billion, one hundred one million, two hundred twelve thousand, twenty-one".