22001212212011 has 4 divisors (see below), whose sum is σ = 22003621200912. Its totient is φ = 21998803223112.

The previous prime is 22001212211983. The next prime is 22001212212019. The reversal of 22001212212011 is 11021221210022.

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

It is a cyclic number.

It is not a de Polignac number, because 22001212212011 - 2⁴² = 17603165700907 is a prime.

It is a super-2 number, since 2×22001212212011² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22001212212019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1204480751 + ... + 1204499016.

It is an arithmetic number, because the mean of its divisors is an integer number (5500905300228).

Almost surely, 2^{22001212212011} is an apocalyptic number.

22001212212011 is a deficient number, since it is larger than the sum of its proper divisors (2408988901).

22001212212011 is an equidigital number, since it uses as much as digits as its factorization.

22001212212011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2408988900.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 22001212212011 its reverse (11021221210022), we get a palindrome (33022433422033).

The spelling of 22001212212011 in words is "twenty-two trillion, one billion, two hundred twelve million, two hundred twelve thousand, eleven".