1220203231 has 8 divisors (see below), whose sum is σ = 1332573984. Its totient is φ = 1110476640.

The previous prime is 1220203223. The next prime is 1220203247. The reversal of 1220203231 is 1323020221.

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

It is not a de Polignac number, because 1220203231 - 2³ = 1220203223 is a prime.

It is a super-2 number, since 2×1220203231² = 2977791849885678722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220203211) 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, 660076 + ... + 661921.

It is an arithmetic number, because the mean of its divisors is an integer number (166571748).

Almost surely, 2^1220203231 is an apocalyptic number.

1220203231 is a deficient number, since it is larger than the sum of its proper divisors (112370753).

1220203231 is a wasteful number, since it uses less digits than its factorization.

1220203231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1322081.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 1220203231 is about 34931.4075153006. The cubic root of 1220203231 is about 1068.5890597413.

Adding to 1220203231 its reverse (1323020221), we get a palindrome (2543223452).

The spelling of 1220203231 in words is "one billion, two hundred twenty million, two hundred three thousand, two hundred thirty-one".