1221450010435 has 4 divisors (see below), whose sum is σ = 1465740012528. Its totient is φ = 977160008344.

The previous prime is 1221450010399. The next prime is 1221450010441. The reversal of 1221450010435 is 5340100541221.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1221450010435 - 2²⁵ = 1221416456003 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 122145001039 + ... + 122145001048.

It is an arithmetic number, because the mean of its divisors is an integer number (366435003132).

Almost surely, 2^{1221450010435} is an apocalyptic number.

1221450010435 is a deficient number, since it is larger than the sum of its proper divisors (244290002093).

1221450010435 is an equidigital number, since it uses as much as digits as its factorization.

1221450010435 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244290002092.

The product of its (nonzero) digits is 4800, while the sum is 28.

Adding to 1221450010435 its reverse (5340100541221), we get a palindrome (6561550551656).

The spelling of 1221450010435 in words is "one trillion, two hundred twenty-one billion, four hundred fifty million, ten thousand, four hundred thirty-five".