21220120002010 has 16 divisors (see below), whose sum is σ = 38719451840616. Its totient is φ = 8371773370368.

The previous prime is 21220120002001. The next prime is 21220120002023. The reversal of 21220120002010 is 1020002102212.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 14373644805081 + 6846475196929 = 3791259^2 + 2616577^2 .

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, 14534328039 + ... + 14534329498.

Almost surely, 2^{21220120002010} is an apocalyptic number.

21220120002010 is a deficient number, since it is larger than the sum of its proper divisors (17499331838606).

21220120002010 is a wasteful number, since it uses less digits than its factorization.

21220120002010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29068657617.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 21220120002010 its reverse (1020002102212), we get a palindrome (22240122104222).

The spelling of 21220120002010 in words is "twenty-one trillion, two hundred twenty billion, one hundred twenty million, two thousand, ten".