21020001220010 has 128 divisors (see below), whose sum is σ = 41470468300800. Its totient is φ = 7624616832000.

The previous prime is 21020001220007. The next prime is 21020001220013. The reversal of 21020001220010 is 1002210002012.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (21020001220007) and next prime (21020001220013).

It is a junction number, because it is equal to n+sod(n) for n = 21020001219973 and 21020001220000.

It is not an unprimeable number, because it can be changed into a prime (21020001220013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4050874496 + ... + 4050879684.

It is an arithmetic number, because the mean of its divisors is an integer number (323988033600).

Almost surely, 2^{21020001220010} is an apocalyptic number.

21020001220010 is a deficient number, since it is larger than the sum of its proper divisors (20450467080790).

21020001220010 is a wasteful number, since it uses less digits than its factorization.

21020001220010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7696.

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

Adding to 21020001220010 its reverse (1002210002012), we get a palindrome (22022211222022).

The spelling of 21020001220010 in words is "twenty-one trillion, twenty billion, one million, two hundred twenty thousand, ten".