1210122100 has 72 divisors (see below), whose sum is σ = 2870941248. Its totient is φ = 439084800.

The previous prime is 1210122091. The next prime is 1210122119. The reversal of 1210122100 is 12210121.

It is a Harshad number since it is a multiple of its sum of digits (10).

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, 677809 + ... + 679591.

It is an arithmetic number, because the mean of its divisors is an integer number (39874184).

Almost surely, 2^1210122100 is an apocalyptic number.

1210122100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1210122100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1435470624).

1210122100 is an abundant number, since it is smaller than the sum of its proper divisors (1660819148).

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

1210122100 is a wasteful number, since it uses less digits than its factorization.

1210122100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2425 (or 2418 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

The square root of 1210122100 is about 34786.8092816803. The cubic root of 1210122100 is about 1065.6380785454.

Adding to 1210122100 its reverse (12210121), we get a palindrome (1222332221).

The spelling of 1210122100 in words is "one billion, two hundred ten million, one hundred twenty-two thousand, one hundred".