201001212122021 has 8 divisors (see below), whose sum is σ = 202054127145984. Its totient is φ = 199948302855280.

The previous prime is 201001212121999. The next prime is 201001212122047. The reversal of 201001212122021 is 120221212100102.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201001212122021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201001212122621) 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, 80862320 + ... + 83310966.

It is an arithmetic number, because the mean of its divisors is an integer number (25256765893248).

Almost surely, 2^{201001212122021} is an apocalyptic number.

It is an amenable number.

201001212122021 is a deficient number, since it is larger than the sum of its proper divisors (1052915023963).

201001212122021 is a wasteful number, since it uses less digits than its factorization.

201001212122021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2878611.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 201001212122021 its reverse (120221212100102), we get a palindrome (321222424222123).

The spelling of 201001212122021 in words is "two hundred one trillion, one billion, two hundred twelve million, one hundred twenty-two thousand, twenty-one".