2000001221121 has 16 divisors (see below), whose sum is σ = 2758743610560. Its totient is φ = 1287300530880.

The previous prime is 2000001221111. The next prime is 2000001221123. The reversal of 2000001221121 is 1211221000002.

It is not a de Polignac number, because 2000001221121 - 2²⁶ = 1999934112257 is a prime.

It is a super-2 number, since 2×2000001221121² (a number of 25 digits) contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2000001221097 and 2000001221106.

It is not an unprimeable number, because it can be changed into a prime (2000001221123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1532811 + ... + 2519823.

It is an arithmetic number, because the mean of its divisors is an integer number (172421475660).

Almost surely, 2^{2000001221121} is an apocalyptic number.

It is an amenable number.

2000001221121 is a deficient number, since it is larger than the sum of its proper divisors (758742389439).

2000001221121 is a wasteful number, since it uses less digits than its factorization.

2000001221121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1010336.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 2000001221121 its reverse (1211221000002), we get a palindrome (3211222221123).

The spelling of 2000001221121 in words is "two trillion, one million, two hundred twenty-one thousand, one hundred twenty-one".