20001111010002 has 96 divisors (see below), whose sum is σ = 47737080069120. Its totient is φ = 6024113964000.

The previous prime is 20001111009977. The next prime is 20001111010009. The reversal of 20001111010002 is 20001011110002.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (20001111010009) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 934374 + ... + 6393377.

It is an arithmetic number, because the mean of its divisors is an integer number (497261250720).

Almost surely, 2^{20001111010002} is an apocalyptic number.

20001111010002 is an abundant number, since it is smaller than the sum of its proper divisors (27735969059118).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20001111010002 is a wasteful number, since it uses less digits than its factorization.

20001111010002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7328148 (or 7328145 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 20001111010002 its reverse (20001011110002), we get a palindrome (40002122120004).

The spelling of 20001111010002 in words is "twenty trillion, one billion, one hundred eleven million, ten thousand, two".