11111020100 has 36 divisors (see below), whose sum is σ = 24349657668. Its totient is φ = 4400400000.

The previous prime is 11111020091. The next prime is 11111020121. The reversal of 11111020100 is 102011111.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 260047876 + 10850972224 = 16126^2 + 104168^2 .

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, 539951 + ... + 560150.

Almost surely, 2^11111020100 is an apocalyptic number.

11111020100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11111020100 is an abundant number, since it is smaller than the sum of its proper divisors (13238637568).

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

11111020100 is a wasteful number, since it uses less digits than its factorization.

11111020100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1100216 (or 1100209 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 8.

Adding to 11111020100 its reverse (102011111), we get a palindrome (11213031211).

It can be divided in two parts, 11 and 111020100, that added together give a palindrome (111020111).

The spelling of 11111020100 in words is "eleven billion, one hundred eleven million, twenty thousand, one hundred".