1111012100020 has 24 divisors (see below), whose sum is σ = 2333258272800. Its totient is φ = 444379532832.

The previous prime is 1111012099973. The next prime is 1111012100021. The reversal of 1111012100020 is 200012101111.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1111012100021) 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, 1219690 + ... + 1926049.

It is an arithmetic number, because the mean of its divisors is an integer number (97219094700).

Almost surely, 2^{1111012100020} is an apocalyptic number.

1111012100020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1111012100020 is an abundant number, since it is smaller than the sum of its proper divisors (1222246172780).

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

1111012100020 is a wasteful number, since it uses less digits than its factorization.

1111012100020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3163407 (or 3163405 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 1111012100020 its reverse (200012101111), we get a palindrome (1311024201131).

The spelling of 1111012100020 in words is "one trillion, one hundred eleven billion, twelve million, one hundred thousand, twenty".