121101000020001 has 20 divisors (see below), whose sum is σ = 180904258920000. Its totient is φ = 80733867946776.

The previous prime is 121101000019957. The next prime is 121101000020029. The reversal of 121101000020001 is 100020000101121.

It is a happy number.

It is not a de Polignac number, because 121101000020001 - 2⁷ = 121101000019873 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 (121101000020501) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 97121500 + ... + 98360498.

It is an arithmetic number, because the mean of its divisors is an integer number (9045212946000).

Almost surely, 2^{121101000020001} is an apocalyptic number.

It is an amenable number.

121101000020001 is a deficient number, since it is larger than the sum of its proper divisors (59803258899999).

121101000020001 is a wasteful number, since it uses less digits than its factorization.

121101000020001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2445690 (or 2445681 counting only the distinct ones).

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

Adding to 121101000020001 its reverse (100020000101121), we get a palindrome (221121000121122).

The spelling of 121101000020001 in words is "one hundred twenty-one trillion, one hundred one billion, twenty thousand, one".