121121120210001 has 32 divisors (see below), whose sum is σ = 167154413045760. Its totient is φ = 77920656550464.

The previous prime is 121121120209951. The next prime is 121121120210033. The reversal of 121121120210001 is 100012021121121.

It is a happy number.

It is not a de Polignac number, because 121121120210001 - 2¹¹ = 121121120207953 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121121120910001) 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, 1616570526 + ... + 1616645448.

It is an arithmetic number, because the mean of its divisors is an integer number (5223575407680).

Almost surely, 2^{121121120210001} is an apocalyptic number.

It is an amenable number.

121121120210001 is a deficient number, since it is larger than the sum of its proper divisors (46033292835759).

121121120210001 is a wasteful number, since it uses less digits than its factorization.

121121120210001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84805.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 121121120210001 its reverse (100012021121121), we get a palindrome (221133141331122).

The spelling of 121121120210001 in words is "one hundred twenty-one trillion, one hundred twenty-one billion, one hundred twenty million, two hundred ten thousand, one".