2001122021012 has 6 divisors (see below), whose sum is σ = 3501963536778. Its totient is φ = 1000561010504.

The previous prime is 2001122020999. The next prime is 2001122021057. The reversal of 2001122021012 is 2101202211002.

It can be written as a sum of positive squares in only one way, i.e., 1110144605956 + 890977415056 = 1053634^2 + 943916^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 250140252623 + ... + 250140252630.

It is an arithmetic number, because the mean of its divisors is an integer number (583660589463).

Almost surely, 2^{2001122021012} is an apocalyptic number.

It is an amenable number.

2001122021012 is a deficient number, since it is larger than the sum of its proper divisors (1500841515766).

2001122021012 is a wasteful number, since it uses less digits than its factorization.

2001122021012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 500280505257 (or 500280505255 counting only the distinct ones).

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

Adding to 2001122021012 its reverse (2101202211002), we get a palindrome (4102324232014).

The spelling of 2001122021012 in words is "two trillion, one billion, one hundred twenty-two million, twenty-one thousand, twelve".