1220041510420 has 96 divisors (see below), whose sum is σ = 2637060481440. Its totient is φ = 473932892160.

The previous prime is 1220041510351. The next prime is 1220041510421. The reversal of 1220041510420 is 240151400221.

It can be written as a sum of positive squares in 16 ways, for example, as 107476442896 + 1112565067524 = 327836^2 + 1054782^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1220041510391 and 1220041510400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220041510421) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 126280390 + ... + 126290050.

It is an arithmetic number, because the mean of its divisors is an integer number (27469380015).

Almost surely, 2^{1220041510420} is an apocalyptic number.

1220041510420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1220041510420 is an abundant number, since it is smaller than the sum of its proper divisors (1417018971020).

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

1220041510420 is a wasteful number, since it uses less digits than its factorization.

1220041510420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10925 (or 10923 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 22.

Adding to 1220041510420 its reverse (240151400221), we get a palindrome (1460192910641).

The spelling of 1220041510420 in words is "one trillion, two hundred twenty billion, forty-one million, five hundred ten thousand, four hundred twenty".