1210001100 has 288 divisors, whose sum is σ = 4458048000. Its totient is φ = 251193600.

The previous prime is 1210001011. The next prime is 1210001101. The reversal of 1210001100 is 11000121.

It is a Harshad number since it is a multiple of its sum of digits (6).

It is a super Niven number, because it is divisible the sum of any subset of its (nonzero) digits.

It is not an unprimeable number, because it can be changed into a prime (1210001101) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1131366 + ... + 1132434.

Almost surely, 2^1210001100 is an apocalyptic number.

1210001100 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 1210001100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2229024000).

1210001100 is an abundant number, since it is smaller than the sum of its proper divisors (3248046900).

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

1210001100 is a wasteful number, since it uses less digits than its factorization.

1210001100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1118 (or 1097 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 6.

The square root of 1210001100 is about 34785.0700732369. The cubic root of 1210001100 is about 1065.6025596763.

Adding to 1210001100 its reverse (11000121), we get a palindrome (1221001221).

The spelling of 1210001100 in words is "one billion, two hundred ten million, one thousand, one hundred".