1221031113302 has 256 divisors, whose sum is σ = 2723432398848. Its totient is φ = 394396231680.

The previous prime is 1221031113259. The next prime is 1221031113359. The reversal of 1221031113302 is 2033111301221.

It is a happy number.

It is a super-2 number, since 2×1221031113302² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 381213233 + ... + 381216435.

It is an arithmetic number, because the mean of its divisors is an integer number (10638407808).

Almost surely, 2^{1221031113302} is an apocalyptic number.

1221031113302 is an abundant number, since it is smaller than the sum of its proper divisors (1502401285546).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1221031113302 is a wasteful number, since it uses less digits than its factorization.

1221031113302 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3763.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 1221031113302 its reverse (2033111301221), we get a palindrome (3254142414523).

The spelling of 1221031113302 in words is "one trillion, two hundred twenty-one billion, thirty-one million, one hundred thirteen thousand, three hundred two".