2121000121 has 8 divisors (see below), whose sum is σ = 2246171904. Its totient is φ = 1995873600.

The previous prime is 2121000113. The next prime is 2121000127. The reversal of 2121000121 is 1210001212.

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 2121000121 - 2³ = 2121000113 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2121000098 and 2121000107.

It is not an unprimeable number, because it can be changed into a prime (2121000127) 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, 155836 + ... + 168898.

It is an arithmetic number, because the mean of its divisors is an integer number (280771488).

Almost surely, 2^2121000121 is an apocalyptic number.

It is an amenable number.

2121000121 is a deficient number, since it is larger than the sum of its proper divisors (125171783).

2121000121 is a wasteful number, since it uses less digits than its factorization.

2121000121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22631.

The product of its (nonzero) digits is 8, while the sum is 10.

The square root of 2121000121 is about 46054.3170723440. The cubic root of 2121000121 is about 1284.8336365043.

Adding to 2121000121 its reverse (1210001212), we get a palindrome (3331001333).

It can be divided in two parts, 2 and 121000121, that multiplied together give a palindrome (242000242).

The spelling of 2121000121 in words is "two billion, one hundred twenty-one million, one hundred twenty-one", and thus it is an aban number.