100121211022100 has 144 divisors (see below), whose sum is σ = 232034808821760. Its totient is φ = 37366827724800.

The previous prime is 100121211022033. The next prime is 100121211022163. The reversal of 100121211022100 is 1220112121001.

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, 278547296 + ... + 278906504.

It is an arithmetic number, because the mean of its divisors is an integer number (1611352839040).

Almost surely, 2^{100121211022100} is an apocalyptic number.

100121211022100 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 100121211022100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (116017404410880).

100121211022100 is an abundant number, since it is smaller than the sum of its proper divisors (131913597799660).

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

100121211022100 is a wasteful number, since it uses less digits than its factorization.

100121211022100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 360658 (or 360651 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 100121211022100 its reverse (1220112121001), we get a palindrome (101341323143101).

The spelling of 100121211022100 in words is "one hundred trillion, one hundred twenty-one billion, two hundred eleven million, twenty-two thousand, one hundred".