21220010001010 has 32 divisors (see below), whose sum is σ = 38822607841392. Its totient is φ = 8348764865280.

The previous prime is 21220010000957. The next prime is 21220010001049. The reversal of 21220010001010 is 1010001002212.

It can be written as a sum of positive squares in 8 ways, for example, as 37068185961 + 21182941815049 = 192531^2 + 4602493^2 .

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 (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 92002752 + ... + 92233108.

Almost surely, 2^{21220010001010} is an apocalyptic number.

21220010001010 is a deficient number, since it is larger than the sum of its proper divisors (17602597840382).

21220010001010 is a wasteful number, since it uses less digits than its factorization.

21220010001010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 381438.

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

Adding to 21220010001010 its reverse (1010001002212), we get a palindrome (22230011003222).

The spelling of 21220010001010 in words is "twenty-one trillion, two hundred twenty billion, ten million, one thousand, ten".