211112134100021 has 48 divisors (see below), whose sum is σ = 284743052687232. Its totient is φ = 151532137804800.

The previous prime is 211112134099991. The next prime is 211112134100033. The reversal of 211112134100021 is 120001431211112.

It is a happy number.

It is not a de Polignac number, because 211112134100021 - 2⁴² = 206714087588917 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 211112134099966 and 211112134100002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211112134102021) 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 47 ways as a sum of consecutive naturals, for example, 33613040 + ... + 39396201.

It is an arithmetic number, because the mean of its divisors is an integer number (5932146930984).

Almost surely, 2^{211112134100021} is an apocalyptic number.

It is an amenable number.

211112134100021 is a deficient number, since it is larger than the sum of its proper divisors (73630918587211).

211112134100021 is a wasteful number, since it uses less digits than its factorization.

211112134100021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73009370 (or 73009323 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 20.

Adding to 211112134100021 its reverse (120001431211112), we get a palindrome (331113565311133).

The spelling of 211112134100021 in words is "two hundred eleven trillion, one hundred twelve billion, one hundred thirty-four million, one hundred thousand, twenty-one".