210100121238 has 32 divisors (see below), whose sum is σ = 480366432000. Its totient is φ = 60011408160.

The previous prime is 210100121219. The next prime is 210100121239. The reversal of 210100121238 is 832121001012.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210100121239) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 567873 + ... + 861788.

It is an arithmetic number, because the mean of its divisors is an integer number (15011451000).

Almost surely, 2^210100121238 is an apocalyptic number.

210100121238 is an abundant number, since it is smaller than the sum of its proper divisors (270266310762).

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

210100121238 is a wasteful number, since it uses less digits than its factorization.

210100121238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1433172.

The product of its (nonzero) digits is 192, while the sum is 21.

The spelling of 210100121238 in words is "two hundred ten billion, one hundred million, one hundred twenty-one thousand, two hundred thirty-eight".