1021121201077 has 2 divisors, whose sum is σ = 1021121201078. Its totient is φ = 1021121201076.

The previous prime is 1021121201069. The next prime is 1021121201131. The reversal of 1021121201077 is 7701021211201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 614391036561 + 406730164516 = 783831^2 + 637754^2 .

It is a cyclic number.

It is not a de Polignac number, because 1021121201077 - 2³ = 1021121201069 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1021121201677) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510560600538 + 510560600539.

It is an arithmetic number, because the mean of its divisors is an integer number (510560600539).

Almost surely, 2^{1021121201077} is an apocalyptic number.

It is an amenable number.

1021121201077 is a deficient number, since it is larger than the sum of its proper divisors (1).

1021121201077 is an equidigital number, since it uses as much as digits as its factorization.

1021121201077 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 392, while the sum is 25.

Adding to 1021121201077 its reverse (7701021211201), we get a palindrome (8722142412278).

The spelling of 1021121201077 in words is "one trillion, twenty-one billion, one hundred twenty-one million, two hundred one thousand, seventy-seven".