211122221122021 has 16 divisors (see below), whose sum is σ = 231167487120768. Its totient is φ = 191219136408000.

The previous prime is 211122221121947. The next prime is 211122221122073. The reversal of 211122221122021 is 120221122221112.

It is a cyclic number.

It is not a de Polignac number, because 211122221122021 - 2¹⁵ = 211122221089253 is a prime.

It is a super-2 number, since 2×211122221122021² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 211122221121983 and 211122221122001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211122221122081) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30677296 + ... + 36923446.

It is an arithmetic number, because the mean of its divisors is an integer number (14447967945048).

Almost surely, 2^{211122221122021} is an apocalyptic number.

It is an amenable number.

211122221122021 is a deficient number, since it is larger than the sum of its proper divisors (20045265998747).

211122221122021 is a wasteful number, since it uses less digits than its factorization.

211122221122021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6257532.

The product of its (nonzero) digits is 256, while the sum is 22.

Adding to 211122221122021 its reverse (120221122221112), we get a palindrome (331343343343133).

The spelling of 211122221122021 in words is "two hundred eleven trillion, one hundred twenty-two billion, two hundred twenty-one million, one hundred twenty-two thousand, twenty-one".