1220555023004 has 24 divisors (see below), whose sum is σ = 2141658949248. Its totient is φ = 608654021360.

The previous prime is 1220555023003. The next prime is 1220555023013. The reversal of 1220555023004 is 4003205550221.

It is a super-4 number, since 4×1220555023004⁴ (a number of 49 digits) contains 4444 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220555023003) 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, 2962787 + ... + 3349509.

It is an arithmetic number, because the mean of its divisors is an integer number (89235789552).

Almost surely, 2^{1220555023004} is an apocalyptic number.

It is an amenable number.

1220555023004 is a deficient number, since it is larger than the sum of its proper divisors (921103926244).

1220555023004 is a wasteful number, since it uses less digits than its factorization.

1220555023004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 388825 (or 388823 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 29.

The spelling of 1220555023004 in words is "one trillion, two hundred twenty billion, five hundred fifty-five million, twenty-three thousand, four".