1221021122047 has 2 divisors, whose sum is σ = 1221021122048. Its totient is φ = 1221021122046.

The previous prime is 1221021122003. The next prime is 1221021122137. The reversal of 1221021122047 is 7402211201221.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1221021122047 - 2⁷ = 1221021121919 is a prime.

It is a super-3 number, since 3×1221021122047³ (a number of 37 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1221021120047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610510561023 + 610510561024.

It is an arithmetic number, because the mean of its divisors is an integer number (610510561024).

Almost surely, 2^{1221021122047} is an apocalyptic number.

1221021122047 is a deficient number, since it is larger than the sum of its proper divisors (1).

1221021122047 is an equidigital number, since it uses as much as digits as its factorization.

1221021122047 is an odious number, because the sum of its binary digits is odd.

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

Adding to 1221021122047 its reverse (7402211201221), we get a palindrome (8623232323268).

The spelling of 1221021122047 in words is "one trillion, two hundred twenty-one billion, twenty-one million, one hundred twenty-two thousand, forty-seven".