100121010002001 has 24 divisors (see below), whose sum is σ = 144922037378976. Its totient is φ = 66607632132480.

The previous prime is 100121010001997. The next prime is 100121010002029. The reversal of 100121010002001 is 100200010121001.

It is a happy number.

It is not a de Polignac number, because 100121010002001 - 2² = 100121010001997 is a prime.

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

It is not an unprimeable number, because it can be changed into a prime (100121010002071) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 24061006 + ... + 27913688.

It is an arithmetic number, because the mean of its divisors is an integer number (6038418224124).

Almost surely, 2^{100121010002001} is an apocalyptic number.

It is an amenable number.

100121010002001 is a deficient number, since it is larger than the sum of its proper divisors (44801027376975).

100121010002001 is a wasteful number, since it uses less digits than its factorization.

100121010002001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3858733 (or 3858730 counting only the distinct ones).

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

Adding to 100121010002001 its reverse (100200010121001), we get a palindrome (200321020123002).

The spelling of 100121010002001 in words is "one hundred trillion, one hundred twenty-one billion, ten million, two thousand, one".