1031200312061 has 2 divisors, whose sum is σ = 1031200312062. Its totient is φ = 1031200312060.

The previous prime is 1031200312007. The next prime is 1031200312063. The reversal of 1031200312061 is 1602130021301.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 943823908036 + 87376404025 = 971506^2 + 295595^2 .

It is an emirp because it is prime and its reverse (1602130021301) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1031200312061 - 2²⁶ = 1031133203197 is a prime.

Together with 1031200312063, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1031200312063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 515600156030 + 515600156031.

It is an arithmetic number, because the mean of its divisors is an integer number (515600156031).

Almost surely, 2^{1031200312061} is an apocalyptic number.

It is an amenable number.

1031200312061 is a deficient number, since it is larger than the sum of its proper divisors (1).

1031200312061 is an equidigital number, since it uses as much as digits as its factorization.

1031200312061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 1031200312061 its reverse (1602130021301), we get a palindrome (2633330333362).

The spelling of 1031200312061 in words is "one trillion, thirty-one billion, two hundred million, three hundred twelve thousand, sixty-one".