1220422434100 has 36 divisors (see below), whose sum is σ = 2665184975404. Its totient is φ = 485059610880.

The previous prime is 1220422434083. The next prime is 1220422434109. The reversal of 1220422434100 is 14342240221.

It can be written as a sum of positive squares in 6 ways, for example, as 43062890256 + 1177359543844 = 207516^2 + 1085062^2 .

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220422434109) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 38851257 + ... + 38882656.

Almost surely, 2^{1220422434100} is an apocalyptic number.

1220422434100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1220422434100 is an abundant number, since it is smaller than the sum of its proper divisors (1444762541304).

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

1220422434100 is a wasteful number, since it uses less digits than its factorization.

1220422434100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77734084 (or 77734077 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 25.

Adding to 1220422434100 its reverse (14342240221), we get a palindrome (1234764674321).

The spelling of 1220422434100 in words is "one trillion, two hundred twenty billion, four hundred twenty-two million, four hundred thirty-four thousand, one hundred".