213113121000 has 256 divisors, whose sum is σ = 733530470400. Its totient is φ = 51178752000.

The previous prime is 213113120951. The next prime is 213113121101. The reversal of 213113121000 is 121311312.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1532361 + ... + 1665639.

It is an arithmetic number, because the mean of its divisors is an integer number (2865353400).

Almost surely, 2^213113121000 is an apocalyptic number.

213113121000 is a gapful number since it is divisible by the number (20) 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 213113121000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (366765235200).

213113121000 is an abundant number, since it is smaller than the sum of its proper divisors (520417349400).

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

213113121000 is a wasteful number, since it uses less digits than its factorization.

213113121000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133357 (or 133343 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 213113121000 its reverse (121311312), we get a palindrome (213234432312).

The spelling of 213113121000 in words is "two hundred thirteen billion, one hundred thirteen million, one hundred twenty-one thousand".