2001022010121 has 16 divisors (see below), whose sum is σ = 2737353890880.
Its totient is φ = 1299453607680.
The previous prime is 2001022010087. The next prime is 2001022010129. The reversal of 2001022010121 is 1210102201002.
It is not a de Polignac number, because 2001022010121 - 223 = 2001013621513 is a prime.
It is a junction number, because it is equal to n+sod(n) for n = 2001022010097 and 2001022010106.
It is not an unprimeable number, because it can be changed into a prime (2001022010129) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (19) of ones.
It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12571356 + ... + 12729533.
It is an arithmetic number, because the mean of its divisors is an integer number (171084618180).
Almost surely, 22001022010121 is an apocalyptic number.
It is an amenable number.
2001022010121 is a deficient number, since it is larger than the sum of its proper divisors (736331880759).
2001022010121 is a wasteful number, since it uses less digits than its factorization.
2001022010121 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 25301576.
The product of its (nonzero) digits is 16, while the sum is 12.
Adding to 2001022010121 its reverse (1210102201002), we get a palindrome (3211124211123).
The spelling of 2001022010121 in words is "two trillion, one billion, twenty-two million, ten thousand, one hundred twenty-one".