211221112222011 has 32 divisors (see below), whose sum is σ = 289427267870208. Its totient is φ = 136919480302080.

The previous prime is 211221112222007. The next prime is 211221112222033. The reversal of 211221112222011 is 110222211122112.

It is not a de Polignac number, because 211221112222011 - 2² = 211221112222007 is a prime.

It is a super-2 number, since 2×211221112222011² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (211221112222061) 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, 1075710835 + ... + 1075907171.

It is an arithmetic number, because the mean of its divisors is an integer number (9044602120944).

Almost surely, 2^{211221112222011} is an apocalyptic number.

211221112222011 is a deficient number, since it is larger than the sum of its proper divisors (78206155648197).

211221112222011 is a wasteful number, since it uses less digits than its factorization.

211221112222011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202611.

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

Adding to 211221112222011 its reverse (110222211122112), we get a palindrome (321443323344123).

The spelling of 211221112222011 in words is "two hundred eleven trillion, two hundred twenty-one billion, one hundred twelve million, two hundred twenty-two thousand, eleven".