211011221222121 has 8 divisors (see below), whose sum is σ = 281357739786240. Its totient is φ = 140669425069712.

The previous prime is 211011221222093. The next prime is 211011221222129. The reversal of 211011221222121 is 121222122110112.

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 211011221222121 - 2¹³ = 211011221213929 is a prime.

It is not an unprimeable number, because it can be changed into a prime (211011221222129) 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, 1180498665 + ... + 1180677398.

It is an arithmetic number, because the mean of its divisors is an integer number (35169717473280).

Almost surely, 2^{211011221222121} is an apocalyptic number.

It is an amenable number.

211011221222121 is a deficient number, since it is larger than the sum of its proper divisors (70346518564119).

211011221222121 is a wasteful number, since it uses less digits than its factorization.

211011221222121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2361205855.

The product of its (nonzero) digits is 128, while the sum is 21.

Adding to 211011221222121 its reverse (121222122110112), we get a palindrome (332233343332233).

The spelling of 211011221222121 in words is "two hundred eleven trillion, eleven billion, two hundred twenty-one million, two hundred twenty-two thousand, one hundred twenty-one".