21122012010 has 32 divisors (see below), whose sum is σ = 55301268672. Its totient is φ = 5120487680.

The previous prime is 21122011991. The next prime is 21122012053. The reversal of 21122012010 is 1021022112.

It is a super-2 number, since 2×21122012010² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32002719 + ... + 32003378.

It is an arithmetic number, because the mean of its divisors is an integer number (1728164646).

Almost surely, 2^21122012010 is an apocalyptic number.

21122012010 is an abundant number, since it is smaller than the sum of its proper divisors (34179256662).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21122012010 is a wasteful number, since it uses less digits than its factorization.

21122012010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64006118.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 21122012010 its reverse (1021022112), we get a palindrome (22143034122).

The spelling of 21122012010 in words is "twenty-one billion, one hundred twenty-two million, twelve thousand, ten".