1021230120181 has 2 divisors, whose sum is σ = 1021230120182. Its totient is φ = 1021230120180.

The previous prime is 1021230120077. The next prime is 1021230120269. The reversal of 1021230120181 is 1810210321201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 995255640625 + 25974479556 = 997625^2 + 161166^2 .

It is a cyclic number.

It is not a de Polignac number, because 1021230120181 - 2³³ = 1012640185589 is a prime.

It is a super-2 number, since 2×1021230120181² (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 (1021230100181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510615060090 + 510615060091.

It is an arithmetic number, because the mean of its divisors is an integer number (510615060091).

Almost surely, 2^{1021230120181} is an apocalyptic number.

It is an amenable number.

1021230120181 is a deficient number, since it is larger than the sum of its proper divisors (1).

1021230120181 is an equidigital number, since it uses as much as digits as its factorization.

1021230120181 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 22.

Adding to 1021230120181 its reverse (1810210321201), we get a palindrome (2831440441382).

It can be divided in two parts, 1021230 and 120181, that added together give a palindrome (1141411).

The spelling of 1021230120181 in words is "one trillion, twenty-one billion, two hundred thirty million, one hundred twenty thousand, one hundred eighty-one".