21120022012010 has 24 divisors (see below), whose sum is σ = 39071269380780. Its totient is φ = 8219684237184.

The previous prime is 21120022011997. The next prime is 21120022012091. The reversal of 21120022012010 is 1021022002112.

It can be written as a sum of positive squares in 6 ways, for example, as 17963263179481 + 3156758832529 = 4238309^2 + 1776727^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 771353075 + ... + 771380454.

Almost surely, 2^{21120022012010} is an apocalyptic number.

21120022012010 is a deficient number, since it is larger than the sum of its proper divisors (17951247368770).

21120022012010 is a wasteful number, since it uses less digits than its factorization.

21120022012010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1542733610 (or 1542733573 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 21120022012010 its reverse (1021022002112), we get a palindrome (22141044014122).

The spelling of 21120022012010 in words is "twenty-one trillion, one hundred twenty billion, twenty-two million, twelve thousand, ten".