1221203141331 has 8 divisors (see below), whose sum is σ = 1628419776144. Its totient is φ = 814060967040.

The previous prime is 1221203141251. The next prime is 1221203141363. The reversal of 1221203141331 is 1331413021221.

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

It is not a de Polignac number, because 1221203141331 - 2¹⁹ = 1221202617043 is a prime.

It is a super-2 number, since 2×1221203141331² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1221203141381) 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, 18576850 + ... + 18642471.

It is an arithmetic number, because the mean of its divisors is an integer number (203552472018).

Almost surely, 2^{1221203141331} is an apocalyptic number.

1221203141331 is a deficient number, since it is larger than the sum of its proper divisors (407216634813).

1221203141331 is a wasteful number, since it uses less digits than its factorization.

1221203141331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37230261.

The product of its (nonzero) digits is 864, while the sum is 24.

Adding to 1221203141331 its reverse (1331413021221), we get a palindrome (2552616162552).

The spelling of 1221203141331 in words is "one trillion, two hundred twenty-one billion, two hundred three million, one hundred forty-one thousand, three hundred thirty-one".