111021221121012 has 48 divisors (see below), whose sum is σ = 287980326950400. Its totient is φ = 36988105377600.

The previous prime is 111021221120941. The next prime is 111021221121023. The reversal of 111021221121012 is 210121122120111.

It is a happy number.

111021221121012 is a `hidden beast` number, since 11 + 10 + 212 + 211 + 210 + 12 = 666.

111021221121012 is digitally balanced in base 3 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (18).

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, 263237337 + ... + 263658752.

It is an arithmetic number, because the mean of its divisors is an integer number (5999590144800).

Almost surely, 2^{111021221121012} is an apocalyptic number.

111021221121012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

111021221121012 is an abundant number, since it is smaller than the sum of its proper divisors (176959105829388).

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

111021221121012 is a wasteful number, since it uses less digits than its factorization.

111021221121012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 526898053 (or 526898045 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 111021221121012 its reverse (210121122120111), we get a palindrome (321142343241123).

Subtracting 111021221121012 from its reverse (210121122120111), we obtain a palindrome (99099900999099).

The spelling of 111021221121012 in words is "one hundred eleven trillion, twenty-one billion, two hundred twenty-one million, one hundred twenty-one thousand, twelve".