121020012220121 has 32 divisors (see below), whose sum is σ = 143194189797120. Its totient is φ = 100150481147904.

The previous prime is 121020012220103. The next prime is 121020012220127. The reversal of 121020012220121 is 121022210020121.

It is a cyclic number.

It is not a de Polignac number, because 121020012220121 - 2²² = 121020008025817 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121020012220121.

It is not an unprimeable number, because it can be changed into a prime (121020012220127) 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, 8465840 + ... + 17711873.

It is an arithmetic number, because the mean of its divisors is an integer number (4474818431160).

Almost surely, 2^{121020012220121} is an apocalyptic number.

It is an amenable number.

121020012220121 is a deficient number, since it is larger than the sum of its proper divisors (22174177576999).

121020012220121 is a wasteful number, since it uses less digits than its factorization.

121020012220121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26177985.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 121020012220121 its reverse (121022210020121), we get a palindrome (242042222240242).

The spelling of 121020012220121 in words is "one hundred twenty-one trillion, twenty billion, twelve million, two hundred twenty thousand, one hundred twenty-one".