20002121101010 has 16 divisors (see below), whose sum is σ = 36004055247576. Its totient is φ = 8000795714688.

The previous prime is 20002121100971. The next prime is 20002121101021. The reversal of 20002121101010 is 1010112120002.

It can be written as a sum of positive squares in 4 ways, for example, as 12251337036481 + 7750784064529 = 3500191^2 + 2784023^2 .

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20002121100982 and 20002121101000.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4978619 + ... + 8049278.

Almost surely, 2^{20002121101010} is an apocalyptic number.

20002121101010 is a deficient number, since it is larger than the sum of its proper divisors (16001934146566).

20002121101010 is a wasteful number, since it uses less digits than its factorization.

20002121101010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13181437.

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

Adding to 20002121101010 its reverse (1010112120002), we get a palindrome (21012233221012).

The spelling of 20002121101010 in words is "twenty trillion, two billion, one hundred twenty-one million, one hundred one thousand, ten".