1213101400 has 96 divisors (see below), whose sum is σ = 3256979040. Its totient is φ = 411586560.

The previous prime is 1213101377. The next prime is 1213101427. The reversal of 1213101400 is 41013121.

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, 131334 + ... + 140266.

It is an arithmetic number, because the mean of its divisors is an integer number (33926865).

Almost surely, 2^1213101400 is an apocalyptic number.

1213101400 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 1213101400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1628489520).

1213101400 is an abundant number, since it is smaller than the sum of its proper divisors (2043877640).

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

1213101400 is a wasteful number, since it uses less digits than its factorization.

1213101400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9053 (or 9044 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 1213101400 is about 34829.6052231431. The cubic root of 1213101400 is about 1066.5118894347.

Adding to 1213101400 its reverse (41013121), we get a palindrome (1254114521).

The spelling of 1213101400 in words is "one billion, two hundred thirteen million, one hundred one thousand, four hundred".