1213001019869 has 2 divisors, whose sum is σ = 1213001019870. Its totient is φ = 1213001019868.

The previous prime is 1213001019863. The next prime is 1213001020037. The reversal of 1213001019869 is 9689101003121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 884944711225 + 328056308644 = 940715^2 + 572762^2 .

It is a cyclic number.

It is not a de Polignac number, because 1213001019869 - 2²⁴ = 1212984242653 is a prime.

It is a super-2 number, since 2×1213001019869² (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 (1213001019863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606500509934 + 606500509935.

It is an arithmetic number, because the mean of its divisors is an integer number (606500509935).

Almost surely, 2^{1213001019869} is an apocalyptic number.

It is an amenable number.

1213001019869 is a deficient number, since it is larger than the sum of its proper divisors (1).

1213001019869 is an equidigital number, since it uses as much as digits as its factorization.

1213001019869 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23328, while the sum is 41.

The spelling of 1213001019869 in words is "one trillion, two hundred thirteen billion, one million, nineteen thousand, eight hundred sixty-nine".