1220410421544 has 32 divisors (see below), whose sum is σ = 3064120600320. Its totient is φ = 405057534336.

The previous prime is 1220410421537. The next prime is 1220410421561. The reversal of 1220410421544 is 4451240140221.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 109115512 + ... + 109126695.

It is an arithmetic number, because the mean of its divisors is an integer number (95753768760).

Almost surely, 2^{1220410421544} is an apocalyptic number.

It is an amenable number.

1220410421544 is an abundant number, since it is smaller than the sum of its proper divisors (1843710178776).

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

1220410421544 is a wasteful number, since it uses less digits than its factorization.

1220410421544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218242449 (or 218242445 counting only the distinct ones).

The product of its (nonzero) digits is 10240, while the sum is 30.

Adding to 1220410421544 its reverse (4451240140221), we get a palindrome (5671650561765).

The spelling of 1220410421544 in words is "one trillion, two hundred twenty billion, four hundred ten million, four hundred twenty-one thousand, five hundred forty-four".