20001121012010 has 16 divisors (see below), whose sum is σ = 36243642105000. Its totient is φ = 7946754119616.

The previous prime is 20001121012007. The next prime is 20001121012027. The reversal of 20001121012010 is 1021012110002.

It can be written as a sum of positive squares in 4 ways, for example, as 17251304733961 + 2749816278049 = 4153469^2 + 1658257^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20001121011982 and 20001121012000.

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, 6711784085 + ... + 6711787064.

Almost surely, 2^{20001121012010} is an apocalyptic number.

20001121012010 is a deficient number, since it is larger than the sum of its proper divisors (16242521092990).

20001121012010 is a wasteful number, since it uses less digits than its factorization.

20001121012010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13423571305.

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

Adding to 20001121012010 its reverse (1021012110002), we get a palindrome (21022133122012).

The spelling of 20001121012010 in words is "twenty trillion, one billion, one hundred twenty-one million, twelve thousand, ten".