20101001220947 has 2 divisors, whose sum is σ = 20101001220948. Its totient is φ = 20101001220946.

The previous prime is 20101001220943. The next prime is 20101001221001. The reversal of 20101001220947 is 74902210010102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20101001220947 - 2² = 20101001220943 is a prime.

It is not a weakly prime, because it can be changed into another prime (20101001220943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10050500610473 + 10050500610474.

It is an arithmetic number, because the mean of its divisors is an integer number (10050500610474).

Almost surely, 2^{20101001220947} is an apocalyptic number.

20101001220947 is a deficient number, since it is larger than the sum of its proper divisors (1).

20101001220947 is an equidigital number, since it uses as much as digits as its factorization.

20101001220947 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2016, while the sum is 29.

The spelling of 20101001220947 in words is "twenty trillion, one hundred one billion, one million, two hundred twenty thousand, nine hundred forty-seven".