20100120011002 has 16 divisors (see below), whose sum is σ = 30200630149800. Its totient is φ = 10033252771840.

The previous prime is 20100120010979. The next prime is 20100120011021. The reversal of 20100120011002 is 20011002100102.

It can be written as a sum of positive squares in 4 ways, for example, as 14726490675121 + 5373629335881 = 3837511^2 + 2318109^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20100120011002.

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, 1877274 + ... + 6612442.

Almost surely, 2^{20100120011002} is an apocalyptic number.

20100120011002 is a deficient number, since it is larger than the sum of its proper divisors (10100510138798).

20100120011002 is a wasteful number, since it uses less digits than its factorization.

20100120011002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4738721.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 20100120011002 its reverse (20011002100102), we get a palindrome (40111122111104).

The spelling of 20100120011002 in words is "twenty trillion, one hundred billion, one hundred twenty million, eleven thousand, two".