2001210100121 has 8 divisors (see below), whose sum is σ = 2003428308000. Its totient is φ = 1998992115648.

The previous prime is 2001210100117. The next prime is 2001210100129. The reversal of 2001210100121 is 1210010121002.

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 2001210100121 - 2² = 2001210100117 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2001210100129) 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, 23157425 + ... + 23243681.

It is an arithmetic number, because the mean of its divisors is an integer number (250428538500).

Almost surely, 2^{2001210100121} is an apocalyptic number.

It is an amenable number.

2001210100121 is a deficient number, since it is larger than the sum of its proper divisors (2218207879).

2001210100121 is an equidigital number, since it uses as much as digits as its factorization.

2001210100121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111703.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 2001210100121 its reverse (1210010121002), we get a palindrome (3211220221123).

The spelling of 2001210100121 in words is "two trillion, one billion, two hundred ten million, one hundred thousand, one hundred twenty-one".