100212102121545 has 40 divisors (see below), whose sum is σ = 179999471256000. Its totient is φ = 53339347234080.

The previous prime is 100212102121543. The next prime is 100212102121601. The reversal of 100212102121545 is 545121201212001.

100212102121545 is a `hidden beast` number, since 1 + 0 + 0 + 2 + 1 + 2 + 102 + 12 + 1 + 545 = 666.

100212102121545 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 100212102121545 - 2¹ = 100212102121543 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (100212102121543) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 247731061 + ... + 248135250.

It is an arithmetic number, because the mean of its divisors is an integer number (4499986781400).

Almost surely, 2^{100212102121545} is an apocalyptic number.

100212102121545 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

100212102121545 is a deficient number, since it is larger than the sum of its proper divisors (79787369134455).

100212102121545 is an equidigital number, since it uses as much as digits as its factorization.

100212102121545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 495866827 (or 495866818 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 27.

Adding to 100212102121545 its reverse (545121201212001), we get a palindrome (645333303333546).

The spelling of 100212102121545 in words is "one hundred trillion, two hundred twelve billion, one hundred two million, one hundred twenty-one thousand, five hundred forty-five".