211220021210112 has 66 divisors (see below), whose sum is σ = 609893227502988. Its totient is φ = 70406673733632.

The previous prime is 211220021210111. The next prime is 211220021210131. The reversal of 211220021210112 is 211012120022112.

211220021210112 is a `hidden beast` number, since 211 + 220 + 0 + 2 + 121 + 0 + 112 = 666.

It is a super-2 number, since 2×211220021210112² (a number of 29 digits) contains 22 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (211220021210111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11459410338 + ... + 11459428769.

It is an arithmetic number, because the mean of its divisors is an integer number (9240806477318).

Almost surely, 2^{211220021210112} is an apocalyptic number.

It is an amenable number.

211220021210112 is an abundant number, since it is smaller than the sum of its proper divisors (398673206292876).

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

211220021210112 is a wasteful number, since it uses less digits than its factorization.

211220021210112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22918839133 (or 22918839112 counting only the distinct ones).

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

Adding to 211220021210112 its reverse (211012120022112), we get a palindrome (422232141232224).

The spelling of 211220021210112 in words is "two hundred eleven trillion, two hundred twenty billion, twenty-one million, two hundred ten thousand, one hundred twelve".