21122021022010 has 16 divisors (see below), whose sum is σ = 38396069899272. Its totient is φ = 8365156840000.

The previous prime is 21122021021989. The next prime is 21122021022019. The reversal of 21122021022010 is 1022012022112.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 19182026113441 + 1939994908569 = 4379729^2 + 1392837^2 .

It is a super-2 number, since 2×21122021022010² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21122021022019) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10456445041 + ... + 10456447060.

Almost surely, 2^{21122021022010} is an apocalyptic number.

21122021022010 is a deficient number, since it is larger than the sum of its proper divisors (17274048877262).

21122021022010 is a wasteful number, since it uses less digits than its factorization.

21122021022010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20912892209.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 21122021022010 its reverse (1022012022112), we get a palindrome (22144033044122).

The spelling of 21122021022010 in words is "twenty-one trillion, one hundred twenty-two billion, twenty-one million, twenty-two thousand, ten".