121121010020001 has 32 divisors (see below), whose sum is σ = 166946721638400. Its totient is φ = 78067699871040.

The previous prime is 121121010019979. The next prime is 121121010020009. The reversal of 121121010020001 is 100020010121121.

It is not a de Polignac number, because 121121010020001 - 2²² = 121121005825697 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121121010020009) 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, 6817491 + ... + 16991768.

It is an arithmetic number, because the mean of its divisors is an integer number (5217085051200).

Almost surely, 2^{121121010020001} is an apocalyptic number.

It is an amenable number.

121121010020001 is a deficient number, since it is larger than the sum of its proper divisors (45825711618399).

121121010020001 is a wasteful number, since it uses less digits than its factorization.

121121010020001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23809749.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 121121010020001 its reverse (100020010121121), we get a palindrome (221141020141122).

The spelling of 121121010020001 in words is "one hundred twenty-one trillion, one hundred twenty-one billion, ten million, twenty thousand, one".