1220221223331 has 16 divisors (see below), whose sum is σ = 1868281299840. Its totient is φ = 700605486720.

The previous prime is 1220221223327. The next prime is 1220221223339. The reversal of 1220221223331 is 1333221220221.

It is not a de Polignac number, because 1220221223331 - 2² = 1220221223327 is a prime.

It is a super-2 number, since 2×1220221223331² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1220221223339) 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, 973062550 + ... + 973063803.

It is an arithmetic number, because the mean of its divisors is an integer number (116767581240).

Almost surely, 2^{1220221223331} is an apocalyptic number.

1220221223331 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1220221223331 is a deficient number, since it is larger than the sum of its proper divisors (648060076509).

1220221223331 is a wasteful number, since it uses less digits than its factorization.

1220221223331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1946126386.

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 1220221223331 its reverse (1333221220221), we get a palindrome (2553442443552).

The spelling of 1220221223331 in words is "one trillion, two hundred twenty billion, two hundred twenty-one million, two hundred twenty-three thousand, three hundred thirty-one".