22021121001947 has 2 divisors, whose sum is σ = 22021121001948. Its totient is φ = 22021121001946.

The previous prime is 22021121001923. The next prime is 22021121001953. The reversal of 22021121001947 is 74910012112022.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 22021121001947 - 2¹⁸ = 22021120739803 is a prime.

It is not a weakly prime, because it can be changed into another prime (22021121001917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11010560500973 + 11010560500974.

It is an arithmetic number, because the mean of its divisors is an integer number (11010560500974).

Almost surely, 2^{22021121001947} is an apocalyptic number.

22021121001947 is a deficient number, since it is larger than the sum of its proper divisors (1).

22021121001947 is an equidigital number, since it uses as much as digits as its factorization.

22021121001947 is an odious number, because the sum of its binary digits is odd.

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

Adding to 22021121001947 its reverse (74910012112022), we get a palindrome (96931133113969).

The spelling of 22021121001947 in words is "twenty-two trillion, twenty-one billion, one hundred twenty-one million, one thousand, nine hundred forty-seven".