211212222221011 has 16 divisors (see below), whose sum is σ = 230512289356800. Its totient is φ = 191928665466720.

The previous prime is 211212222220933. The next prime is 211212222221029. The reversal of 211212222221011 is 110122222212112.

It is a cyclic number.

It is not a de Polignac number, because 211212222221011 - 2³³ = 211203632286419 is a prime.

It is a super-2 number, since 2×211212222221011² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (211212222221071) 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, 240630765 + ... + 241506913.

It is an arithmetic number, because the mean of its divisors is an integer number (14407018084800).

Almost surely, 2^{211212222221011} is an apocalyptic number.

211212222221011 is a deficient number, since it is larger than the sum of its proper divisors (19300067135789).

211212222221011 is a wasteful number, since it uses less digits than its factorization.

211212222221011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 885546.

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

Adding to 211212222221011 its reverse (110122222212112), we get a palindrome (321334444433123).

The spelling of 211212222221011 in words is "two hundred eleven trillion, two hundred twelve billion, two hundred twenty-two million, two hundred twenty-one thousand, eleven".