100211521545 has 32 divisors (see below), whose sum is σ = 188633456640. Its totient is φ = 50302252800.

The previous prime is 100211521541. The next prime is 100211521547. The reversal of 100211521545 is 545125112001.

It is a happy number.

100211521545 is a `hidden beast` number, since 1 + 0 + 0 + 2 + 115 + 2 + 1 + 545 = 666.

It is not a de Polignac number, because 100211521545 - 2² = 100211521541 is a prime.

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (100211521541) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21830281 + ... + 21834870.

It is an arithmetic number, because the mean of its divisors is an integer number (5894795520).

Almost surely, 2^100211521545 is an apocalyptic number.

100211521545 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

100211521545 is a deficient number, since it is larger than the sum of its proper divisors (88421935095).

100211521545 is a wasteful number, since it uses less digits than its factorization.

100211521545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43665182 (or 43665176 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 27.

Adding to 100211521545 its reverse (545125112001), we get a palindrome (645336633546).

The spelling of 100211521545 in words is "one hundred billion, two hundred eleven million, five hundred twenty-one thousand, five hundred forty-five".