201100121220021 has 8 divisors (see below), whose sum is σ = 269255392429440. Its totient is φ = 133505798745312.

The previous prime is 201100121219993. The next prime is 201100121220041. The reversal of 201100121220021 is 120022121001102.

201100121220021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 201100121220021 - 2¹⁴ = 201100121203637 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201100121220041) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 140237182840 + ... + 140237184273.

It is an arithmetic number, because the mean of its divisors is an integer number (33656924053680).

Almost surely, 2^{201100121220021} is an apocalyptic number.

It is an amenable number.

201100121220021 is a deficient number, since it is larger than the sum of its proper divisors (68155271209419).

201100121220021 is a wasteful number, since it uses less digits than its factorization.

201100121220021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280474367355.

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

Adding to 201100121220021 its reverse (120022121001102), we get a palindrome (321122242221123).

The spelling of 201100121220021 in words is "two hundred one trillion, one hundred billion, one hundred twenty-one million, two hundred twenty thousand, twenty-one".