212111310221100 has 108 divisors (see below), whose sum is σ = 676119781111320. Its totient is φ = 55604320857600.

The previous prime is 212111310221099. The next prime is 212111310221149. The reversal of 212111310221100 is 1122013111212.

It is a happy number.

212111310221100 is a `hidden beast` number, since 2 + 1 + 21 + 11 + 310 + 221 + 100 = 666.

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

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, 1997228541 + ... + 1997334740.

Almost surely, 2^{212111310221100} is an apocalyptic number.

212111310221100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212111310221100 is an abundant number, since it is smaller than the sum of its proper divisors (464008470890220).

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

212111310221100 is a wasteful number, since it uses less digits than its factorization.

212111310221100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3994563360 (or 3994563350 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 18.

Adding to 212111310221100 its reverse (1122013111212), we get a palindrome (213233323332312).

The spelling of 212111310221100 in words is "two hundred twelve trillion, one hundred eleven billion, three hundred ten million, two hundred twenty-one thousand, one hundred".