1211031011077 has 2 divisors, whose sum is σ = 1211031011078. Its totient is φ = 1211031011076.

The previous prime is 1211031010963. The next prime is 1211031011101. The reversal of 1211031011077 is 7701101301121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 958771930561 + 252259080516 = 979169^2 + 502254^2 .

It is a cyclic number.

It is not a de Polignac number, because 1211031011077 - 2³¹ = 1208883527429 is a prime.

It is a super-2 number, since 2×1211031011077² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1211031011777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605515505538 + 605515505539.

It is an arithmetic number, because the mean of its divisors is an integer number (605515505539).

Almost surely, 2^{1211031011077} is an apocalyptic number.

It is an amenable number.

1211031011077 is a deficient number, since it is larger than the sum of its proper divisors (1).

1211031011077 is an equidigital number, since it uses as much as digits as its factorization.

1211031011077 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 294, while the sum is 25.

Adding to 1211031011077 its reverse (7701101301121), we get a palindrome (8912132312198).

The spelling of 1211031011077 in words is "one trillion, two hundred eleven billion, thirty-one million, eleven thousand, seventy-seven".