201121121001010 has 96 divisors (see below), whose sum is σ = 445921196692608. Its totient is φ = 64895767211520.

The previous prime is 201121121000951. The next prime is 201121121001041. The reversal of 201121121001010 is 10100121121102.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 142498797 + ... + 143903263.

It is an arithmetic number, because the mean of its divisors is an integer number (4645012465548).

Almost surely, 2^{201121121001010} is an apocalyptic number.

201121121001010 is an abundant number, since it is smaller than the sum of its proper divisors (244800075691598).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

201121121001010 is a wasteful number, since it uses less digits than its factorization.

201121121001010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1421696 (or 1421689 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 201121121001010 its reverse (10100121121102), we get a palindrome (211221242122112).

The spelling of 201121121001010 in words is "two hundred one trillion, one hundred twenty-one billion, one hundred twenty-one million, one thousand, ten".