1201321061 has 2 divisors, whose sum is σ = 1201321062. Its totient is φ = 1201321060.

The previous prime is 1201320943. The next prime is 1201321097. The reversal of 1201321061 is 1601231021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 619064161 + 582256900 = 24881^2 + 24130^2 .

It is a cyclic number.

It is not a de Polignac number, because 1201321061 - 2¹⁰ = 1201320037 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1221321061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600660530 + 600660531.

It is an arithmetic number, because the mean of its divisors is an integer number (600660531).

Almost surely, 2^1201321061 is an apocalyptic number.

It is an amenable number.

1201321061 is a deficient number, since it is larger than the sum of its proper divisors (1).

1201321061 is an equidigital number, since it uses as much as digits as its factorization.

1201321061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 17.

The square root of 1201321061 is about 34660.0787794835. The cubic root of 1201321061 is about 1063.0483808362.

Adding to 1201321061 its reverse (1601231021), we get a palindrome (2802552082).

The spelling of 1201321061 in words is "one billion, two hundred one million, three hundred twenty-one thousand, sixty-one".