10002121002121 has 8 divisors (see below), whose sum is σ = 10005044513184. Its totient is φ = 9999197931840.

The previous prime is 10002121002113. The next prime is 10002121002131. The reversal of 10002121002121 is 12120012120001.

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 10002121002121 - 2³ = 10002121002113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10002121002131) 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, 48340930 + ... + 48547396.

It is an arithmetic number, because the mean of its divisors is an integer number (1250630564148).

Almost surely, 2^{10002121002121} is an apocalyptic number.

It is an amenable number.

10002121002121 is a deficient number, since it is larger than the sum of its proper divisors (2923511063).

10002121002121 is an equidigital number, since it uses as much as digits as its factorization.

10002121002121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220391.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 10002121002121 its reverse (12120012120001), we get a palindrome (22122133122122).

The spelling of 10002121002121 in words is "ten trillion, two billion, one hundred twenty-one million, two thousand, one hundred twenty-one".