1212053091157 has 2 divisors, whose sum is σ = 1212053091158. Its totient is φ = 1212053091156.

The previous prime is 1212053091103. The next prime is 1212053091167. The reversal of 1212053091157 is 7511903502121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1140536425681 + 71516665476 = 1067959^2 + 267426^2 .

It is a cyclic number.

It is not a de Polignac number, because 1212053091157 - 2³¹ = 1209905607509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1212053091167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606026545578 + 606026545579.

It is an arithmetic number, because the mean of its divisors is an integer number (606026545579).

Almost surely, 2^{1212053091157} is an apocalyptic number.

It is an amenable number.

1212053091157 is a deficient number, since it is larger than the sum of its proper divisors (1).

1212053091157 is an equidigital number, since it uses as much as digits as its factorization.

1212053091157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18900, while the sum is 37.

Adding to 1212053091157 its reverse (7511903502121), we get a palindrome (8723956593278).

The spelling of 1212053091157 in words is "one trillion, two hundred twelve billion, fifty-three million, ninety-one thousand, one hundred fifty-seven".