21122001010 has 32 divisors (see below), whose sum is σ = 43279235712. Its totient is φ = 7346782080.

The previous prime is 21122001007. The next prime is 21122001029. The reversal of 21122001010 is 1010022112.

It is a super-2 number, since 2×21122001010² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4171779 + ... + 4176838.

It is an arithmetic number, because the mean of its divisors is an integer number (1352476116).

Almost surely, 2^21122001010 is an apocalyptic number.

21122001010 is an abundant number, since it is smaller than the sum of its proper divisors (22157234702).

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

21122001010 is a wasteful number, since it uses less digits than its factorization.

21122001010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8348658.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 21122001010 its reverse (1010022112), we get a palindrome (22132023122).

The spelling of 21122001010 in words is "twenty-one billion, one hundred twenty-two million, one thousand, ten".