100121212110204 has 144 divisors (see below), whose sum is σ = 263930156206080. Its totient is φ = 31965833520000.

The previous prime is 100121212110193. The next prime is 100121212110223. The reversal of 100121212110204 is 402011212121001.

It is a super-2 number, since 2×100121212110204² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 314431227 + ... + 314749485.

Almost surely, 2^{100121212110204} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 100121212110204, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (131965078103040).

100121212110204 is an abundant number, since it is smaller than the sum of its proper divisors (163808944095876).

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

100121212110204 is a wasteful number, since it uses less digits than its factorization.

100121212110204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 321192 (or 321187 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 100121212110204 its reverse (402011212121001), we get a palindrome (502132424231205).

The spelling of 100121212110204 in words is "one hundred trillion, one hundred twenty-one billion, two hundred twelve million, one hundred ten thousand, two hundred four".