211112012221121 has 32 divisors (see below), whose sum is σ = 239729644725120. Its totient is φ = 184148725465600.

The previous prime is 211112012221109. The next prime is 211112012221133. The reversal of 211112012221121 is 121122210211112.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (211112012221109) and next prime (211112012221133).

It is a cyclic number.

It is not a de Polignac number, because 211112012221121 - 2⁴² = 206713965710017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 211112012221093 and 211112012221102.

It is not an unprimeable number, because it can be changed into a prime (211112012251121) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 122931701 + ... + 124637181.

It is an arithmetic number, because the mean of its divisors is an integer number (7491551397660).

Almost surely, 2^{211112012221121} is an apocalyptic number.

It is an amenable number.

211112012221121 is a deficient number, since it is larger than the sum of its proper divisors (28617632503999).

211112012221121 is a wasteful number, since it uses less digits than its factorization.

211112012221121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1707937.

The product of its (nonzero) digits is 64, while the sum is 20.

Adding to 211112012221121 its reverse (121122210211112), we get a palindrome (332234222432233).

The spelling of 211112012221121 in words is "two hundred eleven trillion, one hundred twelve billion, twelve million, two hundred twenty-one thousand, one hundred twenty-one".