1221244414435 has 16 divisors (see below), whose sum is σ = 1474383508416. Its totient is φ = 971069636608.

The previous prime is 1221244414433. The next prime is 1221244414463. The reversal of 1221244414435 is 5344144421221.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1221244414435 - 2¹ = 1221244414433 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1221244414394 and 1221244414403.

It is not an unprimeable number, because it can be changed into a prime (1221244414433) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12269187 + ... + 12368323.

It is an arithmetic number, because the mean of its divisors is an integer number (92148969276).

Almost surely, 2^{1221244414435} is an apocalyptic number.

1221244414435 is a deficient number, since it is larger than the sum of its proper divisors (253139093981).

1221244414435 is a wasteful number, since it uses less digits than its factorization.

1221244414435 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114062.

The product of its digits is 122880, while the sum is 37.

Adding to 1221244414435 its reverse (5344144421221), we get a palindrome (6565388835656).

The spelling of 1221244414435 in words is "one trillion, two hundred twenty-one billion, two hundred forty-four million, four hundred fourteen thousand, four hundred thirty-five".