20100111025 has 12 divisors (see below), whose sum is σ = 24928776604. Its totient is φ = 16077096000.

The previous prime is 20100111013. The next prime is 20100111067. The reversal of 20100111025 is 52011100102.

It can be written as a sum of positive squares in 6 ways, for example, as 3947734561 + 16152376464 = 62831^2 + 127092^2 .

It is not a de Polignac number, because 20100111025 - 2¹³ = 20100102833 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20100110996 and 20100111014.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 67495 + ... + 211555.

Almost surely, 2^20100111025 is an apocalyptic number.

20100111025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20100111025 is a deficient number, since it is larger than the sum of its proper divisors (4828665579).

20100111025 is a wasteful number, since it uses less digits than its factorization.

20100111025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149652 (or 149647 counting only the distinct ones).

The product of its (nonzero) digits is 20, while the sum is 13.

Adding to 20100111025 its reverse (52011100102), we get a palindrome (72111211127).

The spelling of 20100111025 in words is "twenty billion, one hundred million, one hundred eleven thousand, twenty-five".