10021121200121 has 4 divisors (see below), whose sum is σ = 10084949997732. Its totient is φ = 9957292402512.

The previous prime is 10021121200081. The next prime is 10021121200147. The reversal of 10021121200121 is 12100212112001.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1108293090025 + 8912828110096 = 1052755^2 + 2985436^2 .

It is a cyclic number.

It is not a de Polignac number, because 10021121200121 - 2²² = 10021117005817 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10021121200096 and 10021121200105.

It is not an unprimeable number, because it can be changed into a prime (10021121200421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31914398570 + ... + 31914398883.

It is an arithmetic number, because the mean of its divisors is an integer number (2521237499433).

Almost surely, 2^{10021121200121} is an apocalyptic number.

It is an amenable number.

10021121200121 is a deficient number, since it is larger than the sum of its proper divisors (63828797611).

10021121200121 is an equidigital number, since it uses as much as digits as its factorization.

10021121200121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63828797610.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 10021121200121 its reverse (12100212112001), we get a palindrome (22121333312122).

The spelling of 10021121200121 in words is "ten trillion, twenty-one billion, one hundred twenty-one million, two hundred thousand, one hundred twenty-one".