2021000120987 has 2 divisors, whose sum is σ = 2021000120988. Its totient is φ = 2021000120986.

The previous prime is 2021000120941. The next prime is 2021000121031. The reversal of 2021000120987 is 7890210001202.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2021000120987 is a prime.

It is not a weakly prime, because it can be changed into another prime (2021000120387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1010500060493 + 1010500060494.

It is an arithmetic number, because the mean of its divisors is an integer number (1010500060494).

Almost surely, 2^{2021000120987} is an apocalyptic number.

2021000120987 is a deficient number, since it is larger than the sum of its proper divisors (1).

2021000120987 is an equidigital number, since it uses as much as digits as its factorization.

2021000120987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4032, while the sum is 32.

The spelling of 2021000120987 in words is "two trillion, twenty-one billion, one hundred twenty thousand, nine hundred eighty-seven".