12212212212021 has 32 divisors (see below), whose sum is σ = 17370692352000. Its totient is φ = 7609697489088.

The previous prime is 12212212211987. The next prime is 12212212212049. The reversal of 12212212212021 is 12021221221221.

It is not a de Polignac number, because 12212212212021 - 2²⁷ = 12212077994293 is a prime.

It is a super-2 number, since 2×12212212212021² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12212212212091) 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, 2287041 + ... + 5445638.

It is an arithmetic number, because the mean of its divisors is an integer number (542834136000).

Almost surely, 2^{12212212212021} is an apocalyptic number.

It is an amenable number.

12212212212021 is a deficient number, since it is larger than the sum of its proper divisors (5158480139979).

12212212212021 is a wasteful number, since it uses less digits than its factorization.

12212212212021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7733073.

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 12212212212021 its reverse (12021221221221), we get a palindrome (24233433433242).

The spelling of 12212212212021 in words is "twelve trillion, two hundred twelve billion, two hundred twelve million, two hundred twelve thousand, twenty-one".