100121100000120 has 48 divisors (see below), whose sum is σ = 325393575001560. Its totient is φ = 26698959999936.

The previous prime is 100121100000113. The next prime is 100121100000121. The reversal of 100121100000120 is 21000001121001.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100121100000121) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 139057082974 + ... + 139057083693.

Almost surely, 2^{100121100000120} is an apocalyptic number.

100121100000120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100121100000120 is an abundant number, since it is smaller than the sum of its proper divisors (225272475001440).

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

100121100000120 is a wasteful number, since it uses less digits than its factorization.

100121100000120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278114166684 (or 278114166677 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 100121100000120 its reverse (21000001121001), we get a palindrome (121121101121121).

The spelling of 100121100000120 in words is "one hundred trillion, one hundred twenty-one billion, one hundred million, one hundred twenty", and thus it is an aban number.