21122112220012 has 6 divisors (see below), whose sum is σ = 36963696385028. Its totient is φ = 10561056110004.

The previous prime is 21122112220009. The next prime is 21122112220039. The reversal of 21122112220012 is 21002221122112.

It is a super-2 number, since 2×21122112220012² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2640264027498 + ... + 2640264027505.

Almost surely, 2^{21122112220012} is an apocalyptic number.

It is an amenable number.

21122112220012 is a deficient number, since it is larger than the sum of its proper divisors (15841584165016).

21122112220012 is a wasteful number, since it uses less digits than its factorization.

21122112220012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5280528055007 (or 5280528055005 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 21122112220012 its reverse (21002221122112), we get a palindrome (42124333342124).

The spelling of 21122112220012 in words is "twenty-one trillion, one hundred twenty-two billion, one hundred twelve million, two hundred twenty thousand, twelve".