121021210202201 has 4 divisors (see below), whose sum is σ = 121021232648100. Its totient is φ = 121021187756304.

The previous prime is 121021210202147. The next prime is 121021210202219. The reversal of 121021210202201 is 102202012120121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 15685370146576 + 105335840055625 = 3960476^2 + 10263325^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121021210202201 is a prime.

It is a super-2 number, since 2×121021210202201² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 121021210202201.

It is not an unprimeable number, because it can be changed into a prime (121021210202231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2279795 + ... + 15723863.

It is an arithmetic number, because the mean of its divisors is an integer number (30255308162025).

Almost surely, 2^{121021210202201} is an apocalyptic number.

It is an amenable number.

121021210202201 is a deficient number, since it is larger than the sum of its proper divisors (22445899).

121021210202201 is an equidigital number, since it uses as much as digits as its factorization.

121021210202201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22445898.

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

Adding to 121021210202201 its reverse (102202012120121), we get a palindrome (223223222322322).

The spelling of 121021210202201 in words is "one hundred twenty-one trillion, twenty-one billion, two hundred ten million, two hundred two thousand, two hundred one".