2102121010121 has 8 divisors (see below), whose sum is σ = 2294699579424. Its totient is φ = 1909788550720.

The previous prime is 2102121010091. The next prime is 2102121010159. The reversal of 2102121010121 is 1210101212012.

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 2102121010121 - 2²⁶ = 2102053901257 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2102121010096 and 2102121010105.

It is not an unprimeable number, because it can be changed into a prime (2102121010181) 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, 61509611 + ... + 61543776.

It is an arithmetic number, because the mean of its divisors is an integer number (286837447428).

Almost surely, 2^{2102121010121} is an apocalyptic number.

It is an amenable number.

2102121010121 is a deficient number, since it is larger than the sum of its proper divisors (192578569303).

2102121010121 is a wasteful number, since it uses less digits than its factorization.

2102121010121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123054951.

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

Adding to 2102121010121 its reverse (1210101212012), we get a palindrome (3312222222133).

The spelling of 2102121010121 in words is "two trillion, one hundred two billion, one hundred twenty-one million, ten thousand, one hundred twenty-one".