101220121000100 has 36 divisors (see below), whose sum is σ = 219658183101504. Its totient is φ = 40486109131680.

The previous prime is 101220121000091. The next prime is 101220121000123. The reversal of 101220121000100 is 1000121022101.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22141712 + ... + 26319111.

It is an arithmetic number, because the mean of its divisors is an integer number (6101616197264).

Almost surely, 2^{101220121000100} is an apocalyptic number.

101220121000100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

101220121000100 is an abundant number, since it is smaller than the sum of its proper divisors (118438062101404).

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

101220121000100 is a wasteful number, since it uses less digits than its factorization.

101220121000100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48481724 (or 48481717 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 101220121000100 its reverse (1000121022101), we get a palindrome (102220242022201).

The spelling of 101220121000100 in words is "one hundred one trillion, two hundred twenty billion, one hundred twenty-one million, one hundred", and thus it is an aban number.