1200011202157 has 2 divisors, whose sum is σ = 1200011202158. Its totient is φ = 1200011202156.

The previous prime is 1200011202077. The next prime is 1200011202161. The reversal of 1200011202157 is 7512021100021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 734704408201 + 465306793956 = 857149^2 + 682134^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1200011202157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1200011202557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600005601078 + 600005601079.

It is an arithmetic number, because the mean of its divisors is an integer number (600005601079).

Almost surely, 2^{1200011202157} is an apocalyptic number.

It is an amenable number.

1200011202157 is a deficient number, since it is larger than the sum of its proper divisors (1).

1200011202157 is an equidigital number, since it uses as much as digits as its factorization.

1200011202157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 280, while the sum is 22.

Adding to 1200011202157 its reverse (7512021100021), we get a palindrome (8712032302178).

The spelling of 1200011202157 in words is "one trillion, two hundred billion, eleven million, two hundred two thousand, one hundred fifty-seven".