121210101222121 has 16 divisors (see below), whose sum is σ = 123797392992000. Its totient is φ = 118656846862848.

The previous prime is 121210101222043. The next prime is 121210101222151. The reversal of 121210101222121 is 121222101012121.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 121210101222121 - 2²¹ = 121210099124969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121210101222151) 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, 14090715 + ... + 20999248.

It is an arithmetic number, because the mean of its divisors is an integer number (7737337062000).

Almost surely, 2^{121210101222121} is an apocalyptic number.

It is an amenable number.

121210101222121 is a deficient number, since it is larger than the sum of its proper divisors (2587291769879).

121210101222121 is a wasteful number, since it uses less digits than its factorization.

121210101222121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35090448.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 121210101222121 its reverse (121222101012121), we get a palindrome (242432202234242).

The spelling of 121210101222121 in words is "one hundred twenty-one trillion, two hundred ten billion, one hundred one million, two hundred twenty-two thousand, one hundred twenty-one".