1203311312221 has 16 divisors (see below), whose sum is σ = 1224147662208. Its totient is φ = 1182585096000.

The previous prime is 1203311312191. The next prime is 1203311312227. The reversal of 1203311312221 is 1222131133021.

It is a cyclic number.

It is not a de Polignac number, because 1203311312221 - 2¹³ = 1203311304029 is a prime.

It is a super-2 number, since 2×1203311312221² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1203311312192 and 1203311312201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1203311312227) 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, 121529371 + ... + 121539271.

It is an arithmetic number, because the mean of its divisors is an integer number (76509228888).

Almost surely, 2^{1203311312221} is an apocalyptic number.

It is an amenable number.

1203311312221 is a deficient number, since it is larger than the sum of its proper divisors (20836349987).

1203311312221 is an equidigital number, since it uses as much as digits as its factorization.

1203311312221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15252.

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 1203311312221 its reverse (1222131133021), we get a palindrome (2425442445242).

The spelling of 1203311312221 in words is "one trillion, two hundred three billion, three hundred eleven million, three hundred twelve thousand, two hundred twenty-one".