1255122100 has 36 divisors (see below), whose sum is σ = 2728068448. Its totient is φ = 501228000.

The previous prime is 1255122061. The next prime is 1255122101. The reversal of 1255122100 is 12215521.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1255122101) 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, 53155 + ... + 73045.

Almost surely, 2^1255122100 is an apocalyptic number.

1255122100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1255122100 is an abundant number, since it is smaller than the sum of its proper divisors (1472946348).

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

1255122100 is a wasteful number, since it uses less digits than its factorization.

1255122100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20536 (or 20529 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 19.

The square root of 1255122100 is about 35427.7024374994. The cubic root of 1255122100 is about 1078.6867038424.

Adding to 1255122100 its reverse (12215521), we get a palindrome (1267337621).

The spelling of 1255122100 in words is "one billion, two hundred fifty-five million, one hundred twenty-two thousand, one hundred".