1243030300121 has 4 divisors (see below), whose sum is σ = 1243200982992. Its totient is φ = 1242859617252.

The previous prime is 1243030300067. The next prime is 1243030300147. The reversal of 1243030300121 is 1210030303421.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1243030300121 - 2²² = 1243026105817 is a prime.

It is a super-2 number, since 2×1243030300121² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1243030300093 and 1243030300102.

It is not an unprimeable number, because it can be changed into a prime (1243030300181) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 85330511 + ... + 85345076.

It is an arithmetic number, because the mean of its divisors is an integer number (310800245748).

Almost surely, 2^{1243030300121} is an apocalyptic number.

It is an amenable number.

1243030300121 is a deficient number, since it is larger than the sum of its proper divisors (170682871).

1243030300121 is an equidigital number, since it uses as much as digits as its factorization.

1243030300121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170682870.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 1243030300121 its reverse (1210030303421), we get a palindrome (2453060603542).

The spelling of 1243030300121 in words is "one trillion, two hundred forty-three billion, thirty million, three hundred thousand, one hundred twenty-one".