2121210089939 has 2 divisors, whose sum is σ = 2121210089940. Its totient is φ = 2121210089938.

The previous prime is 2121210089813. The next prime is 2121210090031. The reversal of 2121210089939 is 9399800121212.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2121210089939 - 2³⁶ = 2052490613203 is a prime.

It is a super-3 number, since 3×2121210089939³ (a number of 38 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2121210089893 and 2121210089902.

It is not a weakly prime, because it can be changed into another prime (2121210089539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060605044969 + 1060605044970.

It is an arithmetic number, because the mean of its divisors is an integer number (1060605044970).

Almost surely, 2^{2121210089939} is an apocalyptic number.

2121210089939 is a deficient number, since it is larger than the sum of its proper divisors (1).

2121210089939 is an equidigital number, since it uses as much as digits as its factorization.

2121210089939 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 139968, while the sum is 47.

The spelling of 2121210089939 in words is "two trillion, one hundred twenty-one billion, two hundred ten million, eighty-nine thousand, nine hundred thirty-nine".