121002121122121 has 32 divisors (see below), whose sum is σ = 131738025355776. Its totient is φ = 110689286400000.

The previous prime is 121002121122119. The next prime is 121002121122133. The reversal of 121002121122121 is 121221121200121.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 121002121122121 - 2¹ = 121002121122119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121002121122101) 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, 911430496 + ... + 911563246.

It is an arithmetic number, because the mean of its divisors is an integer number (4116813292368).

Almost surely, 2^{121002121122121} is an apocalyptic number.

It is an amenable number.

121002121122121 is a deficient number, since it is larger than the sum of its proper divisors (10735904233655).

121002121122121 is a wasteful number, since it uses less digits than its factorization.

121002121122121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137713.

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

Adding to 121002121122121 its reverse (121221121200121), we get a palindrome (242223242322242).

The spelling of 121002121122121 in words is "one hundred twenty-one trillion, two billion, one hundred twenty-one million, one hundred twenty-two thousand, one hundred twenty-one".