1121420404081 has 2 divisors, whose sum is σ = 1121420404082. Its totient is φ = 1121420404080.

The previous prime is 1121420404061. The next prime is 1121420404123. The reversal of 1121420404081 is 1804040241211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 730826653456 + 390593750625 = 854884^2 + 624975^2 .

It is a cyclic number.

It is not a de Polignac number, because 1121420404081 - 2¹³ = 1121420395889 is a prime.

It is a super-2 number, since 2×1121420404081² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1121420404001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 560710202040 + 560710202041.

It is an arithmetic number, because the mean of its divisors is an integer number (560710202041).

Almost surely, 2^{1121420404081} is an apocalyptic number.

It is an amenable number.

1121420404081 is a deficient number, since it is larger than the sum of its proper divisors (1).

1121420404081 is an equidigital number, since it uses as much as digits as its factorization.

1121420404081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2048, while the sum is 28.

Adding to 1121420404081 its reverse (1804040241211), we get a palindrome (2925460645292).

The spelling of 1121420404081 in words is "one trillion, one hundred twenty-one billion, four hundred twenty million, four hundred four thousand, eighty-one".