2021000121919 has 2 divisors, whose sum is σ = 2021000121920. Its totient is φ = 2021000121918.

The previous prime is 2021000121869. The next prime is 2021000121953. The reversal of 2021000121919 is 9191210001202.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2021000121919 is a prime.

It is a super-2 number, since 2×2021000121919² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2021000121979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1010500060959 + 1010500060960.

It is an arithmetic number, because the mean of its divisors is an integer number (1010500060960).

Almost surely, 2^{2021000121919} is an apocalyptic number.

2021000121919 is a deficient number, since it is larger than the sum of its proper divisors (1).

2021000121919 is an equidigital number, since it uses as much as digits as its factorization.

2021000121919 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 28.

The spelling of 2021000121919 in words is "two trillion, twenty-one billion, one hundred twenty-one thousand, nine hundred nineteen".