2100120021983 has 2 divisors, whose sum is σ = 2100120021984. Its totient is φ = 2100120021982.

The previous prime is 2100120021971. The next prime is 2100120022009. The reversal of 2100120021983 is 3891200210012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2100120021983 - 2²⁸ = 2099851586527 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2100120021913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1050060010991 + 1050060010992.

It is an arithmetic number, because the mean of its divisors is an integer number (1050060010992).

Almost surely, 2^{2100120021983} is an apocalyptic number.

2100120021983 is a deficient number, since it is larger than the sum of its proper divisors (1).

2100120021983 is an equidigital number, since it uses as much as digits as its factorization.

2100120021983 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 29.

Adding to 2100120021983 its reverse (3891200210012), we get a palindrome (5991320231995).

The spelling of 2100120021983 in words is "two trillion, one hundred billion, one hundred twenty million, twenty-one thousand, nine hundred eighty-three".