120000211210021 has 2 divisors, whose sum is σ = 120000211210022. Its totient is φ = 120000211210020.

The previous prime is 120000211209979. The next prime is 120000211210079. The reversal of 120000211210021 is 120012112000021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 116536558944100 + 3463652265921 = 10795210^2 + 1861089^2 .

It is a cyclic number.

It is not a de Polignac number, because 120000211210021 - 2²³ = 120000202821413 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 120000211209983 and 120000211210010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (120000211216021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60000105605010 + 60000105605011.

It is an arithmetic number, because the mean of its divisors is an integer number (60000105605011).

Almost surely, 2^{120000211210021} is an apocalyptic number.

It is an amenable number.

120000211210021 is a deficient number, since it is larger than the sum of its proper divisors (1).

120000211210021 is an equidigital number, since it uses as much as digits as its factorization.

120000211210021 is an odious number, because the sum of its binary digits is odd.

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

Adding to 120000211210021 its reverse (120012112000021), we get a palindrome (240012323210042).

The spelling of 120000211210021 in words is "one hundred twenty trillion, two hundred eleven million, two hundred ten thousand, twenty-one".