121210112100001 has 16 divisors (see below), whose sum is σ = 124568720640000. Its totient is φ = 117871064752000.

The previous prime is 121210112099963. The next prime is 121210112100101. The reversal of 121210112100001 is 100001211012121.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121210112100001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121210112100101) 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, 21372576 + ... + 26442526.

It is an arithmetic number, because the mean of its divisors is an integer number (7785545040000).

Almost surely, 2^{121210112100001} is an apocalyptic number.

It is an amenable number.

121210112100001 is a deficient number, since it is larger than the sum of its proper divisors (3358608539999).

121210112100001 is a wasteful number, since it uses less digits than its factorization.

121210112100001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5071880.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 121210112100001 its reverse (100001211012121), we get a palindrome (221211323112122).

The spelling of 121210112100001 in words is "one hundred twenty-one trillion, two hundred ten billion, one hundred twelve million, one hundred thousand, one".