2021012220947 has 2 divisors, whose sum is σ = 2021012220948. Its totient is φ = 2021012220946.

The previous prime is 2021012220943. The next prime is 2021012221043. The reversal of 2021012220947 is 7490222101202.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2021012220947 - 2² = 2021012220943 is a prime.

It is not a weakly prime, because it can be changed into another prime (2021012220943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1010506110473 + 1010506110474.

It is an arithmetic number, because the mean of its divisors is an integer number (1010506110474).

Almost surely, 2^{2021012220947} is an apocalyptic number.

2021012220947 is a deficient number, since it is larger than the sum of its proper divisors (1).

2021012220947 is an equidigital number, since it uses as much as digits as its factorization.

2021012220947 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8064, while the sum is 32.

The spelling of 2021012220947 in words is "two trillion, twenty-one billion, twelve million, two hundred twenty thousand, nine hundred forty-seven".