1212221103231 has 8 divisors (see below), whose sum is σ = 1616356080000. Its totient is φ = 808116764312.

The previous prime is 1212221103193. The next prime is 1212221103251. The reversal of 1212221103231 is 1323011222121.

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

It is a cyclic number.

It is not a de Polignac number, because 1212221103231 - 2²⁵ = 1212187548799 is a prime.

It is a super-2 number, since 2×1212221103231² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1212221103198 and 1212221103207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212221103251) 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, 7566981 + ... + 7725518.

It is an arithmetic number, because the mean of its divisors is an integer number (202044510000).

Almost surely, 2^{1212221103231} is an apocalyptic number.

1212221103231 is a deficient number, since it is larger than the sum of its proper divisors (404134976769).

1212221103231 is a wasteful number, since it uses less digits than its factorization.

1212221103231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15318925.

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

Adding to 1212221103231 its reverse (1323011222121), we get a palindrome (2535232325352).

The spelling of 1212221103231 in words is "one trillion, two hundred twelve billion, two hundred twenty-one million, one hundred three thousand, two hundred thirty-one".