211221210211122 has 8 divisors (see below), whose sum is σ = 422442420422256. Its totient is φ = 70407070070372.

The previous prime is 211221210211073. The next prime is 211221210211133. The reversal of 211221210211122 is 221112012122112.

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

211221210211122 is an admirable number.

It is a super-2 number, since 2×211221210211122² (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17601767517588 + ... + 17601767517599.

It is an arithmetic number, because the mean of its divisors is an integer number (52805302552782).

Almost surely, 2^{211221210211122} is an apocalyptic number.

211221210211122 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

211221210211122 is a wasteful number, since it uses less digits than its factorization.

211221210211122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35203535035192.

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

Adding to 211221210211122 its reverse (221112012122112), we get a palindrome (432333222333234).

The spelling of 211221210211122 in words is "two hundred eleven trillion, two hundred twenty-one billion, two hundred ten million, two hundred eleven thousand, one hundred twenty-two".