2001211010121 has 8 divisors (see below), whose sum is σ = 2825239073184. Its totient is φ = 1255661810240.

The previous prime is 2001211010107. The next prime is 2001211010129. The reversal of 2001211010121 is 1210101121002.

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 2001211010121 - 2⁵ = 2001211010089 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2001211010097 and 2001211010106.

It is not an unprimeable number, because it can be changed into a prime (2001211010129) 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, 19619715735 + ... + 19619715836.

It is an arithmetic number, because the mean of its divisors is an integer number (353154884148).

Almost surely, 2^{2001211010121} is an apocalyptic number.

It is an amenable number.

2001211010121 is a deficient number, since it is larger than the sum of its proper divisors (824028063063).

2001211010121 is a wasteful number, since it uses less digits than its factorization.

2001211010121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39239431591.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 2001211010121 its reverse (1210101121002), we get a palindrome (3211312131123).

The spelling of 2001211010121 in words is "two trillion, one billion, two hundred eleven million, ten thousand, one hundred twenty-one".