21122110222012 has 24 divisors (see below), whose sum is σ = 37470475246400. Its totient is φ = 10416263475456.

The previous prime is 21122110221917. The next prime is 21122110222033. The reversal of 21122110222012 is 21022201122112.

It is a super-2 number, since 2×21122110222012² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28486189 + ... + 29218267.

Almost surely, 2^{21122110222012} is an apocalyptic number.

It is an amenable number.

21122110222012 is a deficient number, since it is larger than the sum of its proper divisors (16348365024388).

21122110222012 is a wasteful number, since it uses less digits than its factorization.

21122110222012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 830965 (or 830963 counting only the distinct ones).

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

Adding to 21122110222012 its reverse (21022201122112), we get a palindrome (42144311344124).

The spelling of 21122110222012 in words is "twenty-one trillion, one hundred twenty-two billion, one hundred ten million, two hundred twenty-two thousand, twelve".