1221422180 has 24 divisors (see below), whose sum is σ = 2798167680. Its totient is φ = 444153440.

The previous prime is 1221422179. The next prime is 1221422231. The reversal of 1221422180 is 812241221.

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, 2775740 + ... + 2776179.

It is an arithmetic number, because the mean of its divisors is an integer number (116590320).

Almost surely, 2^1221422180 is an apocalyptic number.

1221422180 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1221422180 is an abundant number, since it is smaller than the sum of its proper divisors (1576745500).

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

1221422180 is a wasteful number, since it uses less digits than its factorization.

1221422180 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5551939 (or 5551937 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 23.

The square root of 1221422180 is about 34948.8509110099. The cubic root of 1221422180 is about 1068.9447715426.

The spelling of 1221422180 in words is "one billion, two hundred twenty-one million, four hundred twenty-two thousand, one hundred eighty".