10001220212021 has 8 divisors (see below), whose sum is σ = 10684728586080. Its totient is φ = 9333424674288.

The previous prime is 10001220211937. The next prime is 10001220212029. The reversal of 10001220212021 is 12021202210001.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 10001220212021 - 2²⁶ = 10001153103157 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10001220211987 and 10001220212005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10001220212029) 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, 3928207766 + ... + 3928210311.

It is an arithmetic number, because the mean of its divisors is an integer number (1335591073260).

Almost surely, 2^{10001220212021} is an apocalyptic number.

It is an amenable number.

10001220212021 is a deficient number, since it is larger than the sum of its proper divisors (683508374059).

10001220212021 is an equidigital number, since it uses as much as digits as its factorization.

10001220212021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7856418163.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 10001220212021 its reverse (12021202210001), we get a palindrome (22022422422022).

It can be divided in two parts, 10001 and 220212021, that added together give a palindrome (220222022).

The spelling of 10001220212021 in words is "ten trillion, one billion, two hundred twenty million, two hundred twelve thousand, twenty-one".