1221000323435 has 4 divisors (see below), whose sum is σ = 1465200388128. Its totient is φ = 976800258744.

The previous prime is 1221000323419. The next prime is 1221000323443. The reversal of 1221000323435 is 5343230001221.

It is a happy number.

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 1221000323435 - 2⁴ = 1221000323419 is a prime.

It is a super-2 number, since 2×1221000323435² (a number of 25 digits) contains 22 as substring.

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, 122100032339 + ... + 122100032348.

It is an arithmetic number, because the mean of its divisors is an integer number (366300097032).

Almost surely, 2^{1221000323435} is an apocalyptic number.

1221000323435 is a deficient number, since it is larger than the sum of its proper divisors (244200064693).

1221000323435 is an equidigital number, since it uses as much as digits as its factorization.

1221000323435 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244200064692.

The product of its (nonzero) digits is 4320, while the sum is 26.

Adding to 1221000323435 its reverse (5343230001221), we get a palindrome (6564230324656).

The spelling of 1221000323435 in words is "one trillion, two hundred twenty-one billion, three hundred twenty-three thousand, four hundred thirty-five".