22012111021211 has 4 divisors (see below), whose sum is σ = 22147154647272. Its totient is φ = 21877067395152.

The previous prime is 22012111021189. The next prime is 22012111021231. The reversal of 22012111021211 is 11212011121022.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22012111021211 is a prime.

It is a super-2 number, since 2×22012111021211² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 22012111021211.

It is not an unprimeable number, because it can be changed into a prime (22012111021231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67521812786 + ... + 67521813111.

It is an arithmetic number, because the mean of its divisors is an integer number (5536788661818).

Almost surely, 2^{22012111021211} is an apocalyptic number.

22012111021211 is a deficient number, since it is larger than the sum of its proper divisors (135043626061).

22012111021211 is a wasteful number, since it uses less digits than its factorization.

22012111021211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135043626060.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 22012111021211 its reverse (11212011121022), we get a palindrome (33224122142233).

The spelling of 22012111021211 in words is "twenty-two trillion, twelve billion, one hundred eleven million, twenty-one thousand, two hundred eleven".