1220543551110 has 48 divisors (see below), whose sum is σ = 3171968815824. Its totient is φ = 300441488256.

The previous prime is 1220543551099. The next prime is 1220543551133. The reversal of 1220543551110 is 111553450221.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 120364117 + ... + 120374256.

It is an arithmetic number, because the mean of its divisors is an integer number (66082683663).

Almost surely, 2^{1220543551110} is an apocalyptic number.

1220543551110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1220543551110 is an abundant number, since it is smaller than the sum of its proper divisors (1951425264714).

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

1220543551110 is a wasteful number, since it uses less digits than its factorization.

1220543551110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240738409 (or 240738396 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 30.

The spelling of 1220543551110 in words is "one trillion, two hundred twenty billion, five hundred forty-three million, five hundred fifty-one thousand, one hundred ten".