211112221121121 has 8 divisors (see below), whose sum is σ = 281485273254624. Its totient is φ = 140740324867520.

The previous prime is 211112221121107. The next prime is 211112221121141. The reversal of 211112221121121 is 121121122211112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 211112221121121 - 2¹³ = 211112221112929 is a prime.

It is not an unprimeable number, because it can be changed into a prime (211112221121141) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 288543720 + ... + 289274441.

It is an arithmetic number, because the mean of its divisors is an integer number (35185659156828).

Almost surely, 2^{211112221121121} is an apocalyptic number.

It is an amenable number.

211112221121121 is a deficient number, since it is larger than the sum of its proper divisors (70373052133503).

211112221121121 is a wasteful number, since it uses less digits than its factorization.

211112221121121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 577939951.

The product of its digits is 64, while the sum is 21.

Adding to 211112221121121 its reverse (121121122211112), we get a palindrome (332233343332233).

The spelling of 211112221121121 in words is "two hundred eleven trillion, one hundred twelve billion, two hundred twenty-one million, one hundred twenty-one thousand, one hundred twenty-one".