20111201002 has 16 divisors (see below), whose sum is σ = 30623394312. Its totient is φ = 9904435200.

The previous prime is 20111200987. The next prime is 20111201009. The reversal of 20111201002 is 20010211102.

It can be written as a sum of positive squares in 4 ways, for example, as 18235531521 + 1875669481 = 135039^2 + 43309^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20111201002.

It is not an unprimeable number, because it can be changed into a prime (20111201009) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 218943 + ... + 296914.

Almost surely, 2^20111201002 is an apocalyptic number.

20111201002 is a deficient number, since it is larger than the sum of its proper divisors (10512193310).

20111201002 is a wasteful number, since it uses less digits than its factorization.

20111201002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 516153.

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

Adding to 20111201002 its reverse (20010211102), we get a palindrome (40121412104).

The spelling of 20111201002 in words is "twenty billion, one hundred eleven million, two hundred one thousand, two".