20102111002 has 12 divisors (see below), whose sum is σ = 30454699518. Its totient is φ = 9951530000.

The previous prime is 20102110961. The next prime is 20102111039. The reversal of 20102111002 is 20011120102.

It can be written as a sum of positive squares in 3 ways, for example, as 20019137121 + 82973881 = 141489^2 + 9109^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20102111002.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 472249 + ... + 513052.

Almost surely, 2^20102111002 is an apocalyptic number.

20102111002 is a deficient number, since it is larger than the sum of its proper divisors (10352588516).

20102111002 is an equidigital number, since it uses as much as digits as its factorization.

20102111002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 985505 (or 985404 counting only the distinct ones).

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

Adding to 20102111002 its reverse (20011120102), we get a palindrome (40113231104).

The spelling of 20102111002 in words is "twenty billion, one hundred two million, one hundred eleven thousand, two".