1021111111100 has 36 divisors (see below), whose sum is σ = 2287288895808. Its totient is φ = 395268816000.

The previous prime is 1021111111099. The next prime is 1021111111103. The reversal of 1021111111100 is 11111111201.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021111111103) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 164692241 + ... + 164698440.

Almost surely, 2^{1021111111100} is an apocalyptic number.

1021111111100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1021111111100 is an abundant number, since it is smaller than the sum of its proper divisors (1266177784708).

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

1021111111100 is a wasteful number, since it uses less digits than its factorization.

1021111111100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 329390726 (or 329390719 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 11.

Adding to 1021111111100 its reverse (11111111201), we get a palindrome (1032222222301).

The spelling of 1021111111100 in words is "one trillion, twenty-one billion, one hundred eleven million, one hundred eleven thousand, one hundred".