20001002220001 has 16 divisors (see below), whose sum is σ = 23106745723968. Its totient is φ = 17110206016000.

The previous prime is 20001002219983. The next prime is 20001002220097. The reversal of 20001002220001 is 10002220010002.

It is a cyclic number.

It is not a de Polignac number, because 20001002220001 - 2¹¹ = 20001002217953 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20001002220001.

It is not an unprimeable number, because it can be changed into a prime (20001002223001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8134075 + ... + 10303648.

It is an arithmetic number, because the mean of its divisors is an integer number (1444171607748).

Almost surely, 2^{20001002220001} is an apocalyptic number.

It is an amenable number.

20001002220001 is a deficient number, since it is larger than the sum of its proper divisors (3105743503967).

20001002220001 is a wasteful number, since it uses less digits than its factorization.

20001002220001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18443552.

The product of its (nonzero) digits is 16, while the sum is 10.

Adding to 20001002220001 its reverse (10002220010002), we get a palindrome (30003222230003).

It can be divided in two parts, 2000 and 1002220001, that added together give a palindrome (1002222001).

The spelling of 20001002220001 in words is "twenty trillion, one billion, two million, two hundred twenty thousand, one".