1101030120521 has 2 divisors, whose sum is σ = 1101030120522. Its totient is φ = 1101030120520.

The previous prime is 1101030120499. The next prime is 1101030120539. The reversal of 1101030120521 is 1250210301011.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1052634960400 + 48395160121 = 1025980^2 + 219989^2 .

It is a cyclic number.

It is not a de Polignac number, because 1101030120521 - 2¹⁸ = 1101029858377 is a prime.

It is a super-2 number, since 2×1101030120521² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1101030120521.

It is not a weakly prime, because it can be changed into another prime (1101030120121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 550515060260 + 550515060261.

It is an arithmetic number, because the mean of its divisors is an integer number (550515060261).

Almost surely, 2^{1101030120521} is an apocalyptic number.

It is an amenable number.

1101030120521 is a deficient number, since it is larger than the sum of its proper divisors (1).

1101030120521 is an equidigital number, since it uses as much as digits as its factorization.

1101030120521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 60, while the sum is 17.

Adding to 1101030120521 its reverse (1250210301011), we get a palindrome (2351240421532).

The spelling of 1101030120521 in words is "one trillion, one hundred one billion, thirty million, one hundred twenty thousand, five hundred twenty-one".