1235206362081 has 16 divisors (see below), whose sum is σ = 1710222252480. Its totient is φ = 792380954880.

The previous prime is 1235206362037. The next prime is 1235206362133. The reversal of 1235206362081 is 1802636025321.

It is a happy number.

It is not a de Polignac number, because 1235206362081 - 2¹⁰ = 1235206361057 is a prime.

It is a super-2 number, since 2×1235206362081² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1235206369081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 68774091 + ... + 68792048.

It is an arithmetic number, because the mean of its divisors is an integer number (106888890780).

Almost surely, 2^{1235206362081} is an apocalyptic number.

It is an amenable number.

1235206362081 is a deficient number, since it is larger than the sum of its proper divisors (475015890399).

1235206362081 is a wasteful number, since it uses less digits than its factorization.

1235206362081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137566256.

The product of its (nonzero) digits is 103680, while the sum is 39.

The spelling of 1235206362081 in words is "one trillion, two hundred thirty-five billion, two hundred six million, three hundred sixty-two thousand, eighty-one".