111212210222100 has 108 divisors (see below), whose sum is σ = 375402994100316. Its totient is φ = 27375313282560.

The previous prime is 111212210222089. The next prime is 111212210222147. The reversal of 111212210222100 is 1222012212111.

111212210222100 is a `hidden beast` number, since 1 + 1 + 121 + 221 + 0 + 222 + 100 = 666.

It can be written as a sum of positive squares in 6 ways, for example, as 8809427652624 + 102402782569476 = 2968068^2 + 10119426^2 .

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 35 ways as a sum of consecutive naturals, for example, 4752646857 + ... + 4752670256.

It is an arithmetic number, because the mean of its divisors is an integer number (3475953649077).

Almost surely, 2^{111212210222100} is an apocalyptic number.

111212210222100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111212210222100 is an abundant number, since it is smaller than the sum of its proper divisors (264190783878216).

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

111212210222100 is a wasteful number, since it uses less digits than its factorization.

111212210222100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9505317146 (or 9505317136 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 111212210222100 its reverse (1222012212111), we get a palindrome (112434222434211).

The spelling of 111212210222100 in words is "one hundred eleven trillion, two hundred twelve billion, two hundred ten million, two hundred twenty-two thousand, one hundred".