2001023132121 has 12 divisors (see below), whose sum is σ = 3112702650148. Its totient is φ = 1231398850464.

The previous prime is 2001023132093. The next prime is 2001023132123. The reversal of 2001023132121 is 1212313201002.

It can be written as a sum of positive squares in 2 ways, for example, as 1074301155225 + 926721976896 = 1036485^2 + 962664^2 .

It is not a de Polignac number, because 2001023132121 - 2¹³ = 2001023123929 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2001023132094 and 2001023132103.

It is not an unprimeable number, because it can be changed into a prime (2001023132123) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8551380790 + ... + 8551381023.

Almost surely, 2^{2001023132121} is an apocalyptic number.

It is an amenable number.

2001023132121 is a deficient number, since it is larger than the sum of its proper divisors (1111679518027).

2001023132121 is a wasteful number, since it uses less digits than its factorization.

2001023132121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17102761832 (or 17102761829 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 2001023132121 its reverse (1212313201002), we get a palindrome (3213336333123).

The spelling of 2001023132121 in words is "two trillion, one billion, twenty-three million, one hundred thirty-two thousand, one hundred twenty-one".