1042401021197 has 2 divisors, whose sum is σ = 1042401021198. Its totient is φ = 1042401021196.

The previous prime is 1042401021131. The next prime is 1042401021223. The reversal of 1042401021197 is 7911201042401.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1003094390116 + 39306631081 = 1001546^2 + 198259^2 .

It is a cyclic number.

It is not a de Polignac number, because 1042401021197 - 2¹² = 1042401017101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1042401021097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 521200510598 + 521200510599.

It is an arithmetic number, because the mean of its divisors is an integer number (521200510599).

Almost surely, 2^{1042401021197} is an apocalyptic number.

It is an amenable number.

1042401021197 is a deficient number, since it is larger than the sum of its proper divisors (1).

1042401021197 is an equidigital number, since it uses as much as digits as its factorization.

1042401021197 is an evil number, because the sum of its binary digits is even.

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

Adding to 1042401021197 its reverse (7911201042401), we get a palindrome (8953602063598).

The spelling of 1042401021197 in words is "one trillion, forty-two billion, four hundred one million, twenty-one thousand, one hundred ninety-seven".