20200121122101 has 4 divisors (see below), whose sum is σ = 26933494829472. Its totient is φ = 13466747414732.

The previous prime is 20200121122063. The next prime is 20200121122147. The reversal of 20200121122101 is 10122112100202.

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.

It is a cyclic number.

It is not a de Polignac number, because 20200121122101 - 2¹⁵ = 20200121089333 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20200121122171) 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, 3366686853681 + ... + 3366686853686.

It is an arithmetic number, because the mean of its divisors is an integer number (6733373707368).

Almost surely, 2^{20200121122101} is an apocalyptic number.

It is an amenable number.

20200121122101 is a deficient number, since it is larger than the sum of its proper divisors (6733373707371).

20200121122101 is an equidigital number, since it uses as much as digits as its factorization.

20200121122101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6733373707370.

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

Adding to 20200121122101 its reverse (10122112100202), we get a palindrome (30322233222303).

The spelling of 20200121122101 in words is "twenty trillion, two hundred billion, one hundred twenty-one million, one hundred twenty-two thousand, one hundred one".