1211222321103 has 8 divisors (see below), whose sum is σ = 1614968196400. Its totient is φ = 807478996608.

The previous prime is 1211222321041. The next prime is 1211222321119. The reversal of 1211222321103 is 3011232221121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1211222321103 - 2¹² = 1211222317007 is a prime.

It is a super-2 number, since 2×1211222321103² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1211222321103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211222322103) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1405143 + ... + 2096871.

It is an arithmetic number, because the mean of its divisors is an integer number (201871024550).

Almost surely, 2^{1211222321103} is an apocalyptic number.

1211222321103 is a deficient number, since it is larger than the sum of its proper divisors (403745875297).

1211222321103 is an equidigital number, since it uses as much as digits as its factorization.

1211222321103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1275401.

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 1211222321103 its reverse (3011232221121), we get a palindrome (4222454542224).

The spelling of 1211222321103 in words is "one trillion, two hundred eleven billion, two hundred twenty-two million, three hundred twenty-one thousand, one hundred three".