1220000203231 has 8 divisors (see below), whose sum is σ = 1273149182304. Its totient is φ = 1166860015200.

The previous prime is 1220000203061. The next prime is 1220000203249. The reversal of 1220000203231 is 1323020000221.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1220000203231 is a prime.

It is a super-2 number, since 2×1220000203231² (a number of 25 digits) 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 (1220000203291) 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, 1913376 + ... + 2470021.

It is an arithmetic number, because the mean of its divisors is an integer number (159143647788).

Almost surely, 2^{1220000203231} is an apocalyptic number.

1220000203231 is a deficient number, since it is larger than the sum of its proper divisors (53148979073).

1220000203231 is a wasteful number, since it uses less digits than its factorization.

1220000203231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4395521.

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

Adding to 1220000203231 its reverse (1323020000221), we get a palindrome (2543020203452).

The spelling of 1220000203231 in words is "one trillion, two hundred twenty billion, two hundred three thousand, two hundred thirty-one".