201001121000021 has 8 divisors (see below), whose sum is σ = 201023634050304. Its totient is φ = 200978608559040.

The previous prime is 201001120999979. The next prime is 201001121000033. The reversal of 201001121000021 is 120000121100102.

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

It is a cyclic number.

It is not a de Polignac number, because 201001121000021 - 2⁶ = 201001120999957 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201001120999966 and 201001121000011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201001121000041) 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, 1036616546 + ... + 1036810428.

It is an arithmetic number, because the mean of its divisors is an integer number (25127954256288).

Almost surely, 2^{201001121000021} is an apocalyptic number.

It is an amenable number.

201001121000021 is a deficient number, since it is larger than the sum of its proper divisors (22513050283).

201001121000021 is a wasteful number, since it uses less digits than its factorization.

201001121000021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 304651.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 201001121000021 its reverse (120000121100102), we get a palindrome (321001242100123).

The spelling of 201001121000021 in words is "two hundred one trillion, one billion, one hundred twenty-one million, twenty-one", and thus it is an aban number.