100121211001 has 16 divisors (see below), whose sum is σ = 115653597696. Its totient is φ = 84896925696.

The previous prime is 100121210989. The next prime is 100121211007. The reversal of 100121211001 is 100112121001.

It is a cyclic number.

It is not a de Polignac number, because 100121211001 - 2⁹ = 100121210489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (100121211007) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1610640 + ... + 1671646.

It is an arithmetic number, because the mean of its divisors is an integer number (7228349856).

Almost surely, 2^100121211001 is an apocalyptic number.

It is an amenable number.

100121211001 is a deficient number, since it is larger than the sum of its proper divisors (15532386695).

100121211001 is an equidigital number, since it uses as much as digits as its factorization.

100121211001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63528.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 100121211001 its reverse (100112121001), we get a palindrome (200233332002).

The spelling of 100121211001 in words is "one hundred billion, one hundred twenty-one million, two hundred eleven thousand, one".