2021012122147 has 2 divisors, whose sum is σ = 2021012122148. Its totient is φ = 2021012122146.

The previous prime is 2021012122117. The next prime is 2021012122201. The reversal of 2021012122147 is 7412212101202.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2021012122147 is a prime.

It is not a weakly prime, because it can be changed into another prime (2021012122117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1010506061073 + 1010506061074.

It is an arithmetic number, because the mean of its divisors is an integer number (1010506061074).

Almost surely, 2^{2021012122147} is an apocalyptic number.

2021012122147 is a deficient number, since it is larger than the sum of its proper divisors (1).

2021012122147 is an equidigital number, since it uses as much as digits as its factorization.

2021012122147 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 896, while the sum is 25.

Adding to 2021012122147 its reverse (7412212101202), we get a palindrome (9433224223349).

The spelling of 2021012122147 in words is "two trillion, twenty-one billion, twelve million, one hundred twenty-two thousand, one hundred forty-seven".