21121222002212 has 24 divisors (see below), whose sum is σ = 37514259674304. Its totient is φ = 10402865855712.

The previous prime is 21121222002211. The next prime is 21121222002227. The reversal of 21121222002212 is 21220022212112.

It is a super-2 number, since 2×21121222002212² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21121222002211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24513098 + ... + 25360094.

It is an arithmetic number, because the mean of its divisors is an integer number (1563094153096).

Almost surely, 2^{21121222002212} is an apocalyptic number.

It is an amenable number.

21121222002212 is a deficient number, since it is larger than the sum of its proper divisors (16393037672092).

21121222002212 is a wasteful number, since it uses less digits than its factorization.

21121222002212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 940115 (or 940113 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 21121222002212 its reverse (21220022212112), we get a palindrome (42341244214324).

The spelling of 21121222002212 in words is "twenty-one trillion, one hundred twenty-one billion, two hundred twenty-two million, two thousand, two hundred twelve".