121220222303231 has 4 divisors (see below), whose sum is σ = 121222893750912. Its totient is φ = 121217550855552.

The previous prime is 121220222303177. The next prime is 121220222303233. The reversal of 121220222303231 is 132303222022121.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121220222303231 is a prime.

It is a super-2 number, since 2×121220222303231² (a number of 29 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 121220222303231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121220222303233) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1335655775 + ... + 1335746528.

It is an arithmetic number, because the mean of its divisors is an integer number (30305723437728).

Almost surely, 2^{121220222303231} is an apocalyptic number.

121220222303231 is a deficient number, since it is larger than the sum of its proper divisors (2671447681).

121220222303231 is an equidigital number, since it uses as much as digits as its factorization.

121220222303231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2671447680.

The product of its (nonzero) digits is 3456, while the sum is 26.

Adding to 121220222303231 its reverse (132303222022121), we get a palindrome (253523444325352).

The spelling of 121220222303231 in words is "one hundred twenty-one trillion, two hundred twenty billion, two hundred twenty-two million, three hundred three thousand, two hundred thirty-one".