121202122221021 has 16 divisors (see below), whose sum is σ = 163423467648000. Its totient is φ = 79891149980928.

The previous prime is 121202122220899. The next prime is 121202122221023. The reversal of 121202122221021 is 120122221202121.

It is not a de Polignac number, because 121202122221021 - 2¹¹ = 121202122218973 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121202122221023) 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, 2215665 + ... + 15726201.

It is an arithmetic number, because the mean of its divisors is an integer number (10213966728000).

Almost surely, 2^{121202122221021} is an apocalyptic number.

It is an amenable number.

121202122221021 is a deficient number, since it is larger than the sum of its proper divisors (42221345426979).

121202122221021 is a wasteful number, since it uses less digits than its factorization.

121202122221021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13544228.

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 121202122221021 its reverse (120122221202121), we get a palindrome (241324343423142).

The spelling of 121202122221021 in words is "one hundred twenty-one trillion, two hundred two billion, one hundred twenty-two million, two hundred twenty-one thousand, twenty-one".