1355828101021 has 2 divisors, whose sum is σ = 1355828101022. Its totient is φ = 1355828101020.

The previous prime is 1355828100997. The next prime is 1355828101049. The reversal of 1355828101021 is 1201018285531.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1004232468996 + 351595632025 = 1002114^2 + 592955^2 .

It is a cyclic number.

It is not a de Polignac number, because 1355828101021 - 2¹¹ = 1355828098973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1355828104021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 677914050510 + 677914050511.

It is an arithmetic number, because the mean of its divisors is an integer number (677914050511).

Almost surely, 2^{1355828101021} is an apocalyptic number.

It is an amenable number.

1355828101021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1355828101021 is an equidigital number, since it uses as much as digits as its factorization.

1355828101021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19200, while the sum is 37.

It can be divided in two parts, 1355828 and 101021, that added together give a square (1456849 = 1207²).

The spelling of 1355828101021 in words is "one trillion, three hundred fifty-five billion, eight hundred twenty-eight million, one hundred one thousand, twenty-one".