10021220020121 has 8 divisors (see below), whose sum is σ = 10159564668264. Its totient is φ = 9882904227840.

The previous prime is 10021220020061. The next prime is 10021220020283. The reversal of 10021220020121 is 12102002212001.

It can be written as a sum of positive squares in 4 ways, for example, as 4483721550400 + 5537498469721 = 2117480^2 + 2353189^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10021220020121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10021220020096 and 10021220020105.

It is not an unprimeable number, because it can be changed into a prime (10021220020621) 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, 6514136 + ... + 7904201.

It is an arithmetic number, because the mean of its divisors is an integer number (1269945583533).

Almost surely, 2^{10021220020121} is an apocalyptic number.

It is an amenable number.

10021220020121 is a deficient number, since it is larger than the sum of its proper divisors (138344648143).

10021220020121 is an equidigital number, since it uses as much as digits as its factorization.

10021220020121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14427931.

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

Adding to 10021220020121 its reverse (12102002212001), we get a palindrome (22123222232122).

The spelling of 10021220020121 in words is "ten trillion, twenty-one billion, two hundred twenty million, twenty thousand, one hundred twenty-one".