21202020001010 has 16 divisors (see below), whose sum is σ = 38165195350872. Its totient is φ = 8480461478400.

The previous prime is 21202020000919. The next prime is 21202020001067. The reversal of 21202020001010 is 1010002020212.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 2805735551089 + 18396284449921 = 1675033^2 + 4289089^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21202020000982 and 21202020001000.

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, 43058201 + ... + 43547820.

Almost surely, 2^{21202020001010} is an apocalyptic number.

21202020001010 is a deficient number, since it is larger than the sum of its proper divisors (16963175349862).

21202020001010 is a wasteful number, since it uses less digits than its factorization.

21202020001010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86630509.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 21202020001010 its reverse (1010002020212), we get a palindrome (22212022021222).

The spelling of 21202020001010 in words is "twenty-one trillion, two hundred two billion, twenty million, one thousand, ten".