2121000023 has 2 divisors, whose sum is σ = 2121000024. Its totient is φ = 2121000022.

The previous prime is 2120999989. The next prime is 2121000031. The reversal of 2121000023 is 3200001212.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2121000023 - 2¹² = 2120995927 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 2120999968 and 2121000013.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2121000043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060500011 + 1060500012.

It is an arithmetic number, because the mean of its divisors is an integer number (1060500012).

Almost surely, 2^2121000023 is an apocalyptic number.

2121000023 is a deficient number, since it is larger than the sum of its proper divisors (1).

2121000023 is an equidigital number, since it uses as much as digits as its factorization.

2121000023 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 2121000023 is about 46054.3160083830. The cubic root of 2121000023 is about 1284.8336167159.

Adding to 2121000023 its reverse (3200001212), we get a palindrome (5321001235).

The spelling of 2121000023 in words is "two billion, one hundred twenty-one million, twenty-three", and thus it is an aban number.