1220000204531 has 8 divisors (see below), whose sum is σ = 1230837115200. Its totient is φ = 1209164003712.

The previous prime is 1220000204513. The next prime is 1220000204551. The reversal of 1220000204531 is 1354020000221.

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

It is a cyclic number.

It is not a de Polignac number, because 1220000204531 - 2¹⁸ = 1219999942387 is a prime.

It is a super-2 number, since 2×1220000204531² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1220000204551) 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, 3637670 + ... + 3958868.

It is an arithmetic number, because the mean of its divisors is an integer number (153854639400).

Almost surely, 2^{1220000204531} is an apocalyptic number.

1220000204531 is a deficient number, since it is larger than the sum of its proper divisors (10836910669).

1220000204531 is a wasteful number, since it uses less digits than its factorization.

1220000204531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 354925.

The product of its (nonzero) digits is 480, while the sum is 20.

Adding to 1220000204531 its reverse (1354020000221), we get a palindrome (2574020204752).

The spelling of 1220000204531 in words is "one trillion, two hundred twenty billion, two hundred four thousand, five hundred thirty-one".