111001211020020 has 48 divisors (see below), whose sum is σ = 310803920925120. Its totient is φ = 29600272455936.

The previous prime is 111001211019983. The next prime is 111001211020057. The reversal of 111001211020020 is 20020112100111.

It is an interprime number because it is at equal distance from previous prime (111001211019983) and next prime (111001211020057).

It is a super-2 number, since 2×111001211020020² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 111001211019978 and 111001211020005.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45513376 + ... + 47890184.

It is an arithmetic number, because the mean of its divisors is an integer number (6475081685940).

Almost surely, 2^{111001211020020} is an apocalyptic number.

111001211020020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111001211020020 is an abundant number, since it is smaller than the sum of its proper divisors (199802709905100).

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

111001211020020 is a wasteful number, since it uses less digits than its factorization.

111001211020020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3155184 (or 3155182 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 111001211020020 its reverse (20020112100111), we get a palindrome (131021323120131).

The spelling of 111001211020020 in words is "one hundred eleven trillion, one billion, two hundred eleven million, twenty thousand, twenty".