2001012202121 has 8 divisors (see below), whose sum is σ = 2119177103424. Its totient is φ = 1885444331760.

The previous prime is 2001012202109. The next prime is 2001012202141. The reversal of 2001012202121 is 1212022101002.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2001012202121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2001012202096 and 2001012202105.

It is not an unprimeable number, because it can be changed into a prime (2001012202141) 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, 649256150 + ... + 649259231.

It is an arithmetic number, because the mean of its divisors is an integer number (264897137928).

Almost surely, 2^{2001012202121} is an apocalyptic number.

It is an amenable number.

2001012202121 is a deficient number, since it is larger than the sum of its proper divisors (118164901303).

2001012202121 is a wasteful number, since it uses less digits than its factorization.

2001012202121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1298515471.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 2001012202121 its reverse (1212022101002), we get a palindrome (3213034303123).

The spelling of 2001012202121 in words is "two trillion, one billion, twelve million, two hundred two thousand, one hundred twenty-one".