201011212121001 has 32 divisors (see below), whose sum is σ = 270509195324160. Its totient is φ = 132766822155264.

The previous prime is 201011212120937. The next prime is 201011212121011. The reversal of 201011212121001 is 100121212110102.

It is a happy number.

It is not a de Polignac number, because 201011212121001 - 2⁶ = 201011212120937 is a prime.

It is not an unprimeable number, because it can be changed into a prime (201011212121011) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 256843381 + ... + 257624813.

It is an arithmetic number, because the mean of its divisors is an integer number (8453412353880).

Almost surely, 2^{201011212121001} is an apocalyptic number.

It is an amenable number.

201011212121001 is a deficient number, since it is larger than the sum of its proper divisors (69497983203159).

201011212121001 is a wasteful number, since it uses less digits than its factorization.

201011212121001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 783505.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 201011212121001 its reverse (100121212110102), we get a palindrome (301132424231103).

The spelling of 201011212121001 in words is "two hundred one trillion, eleven billion, two hundred twelve million, one hundred twenty-one thousand, one".