202120200102121 has 16 divisors (see below), whose sum is σ = 233282461887360. Its totient is φ = 171529938028800.

The previous prime is 202120200102109. The next prime is 202120200102221. The reversal of 202120200102121 is 121201002021202.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 202120200102121 - 2⁹ = 202120200101609 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 202120200102095 and 202120200102104.

It is not an unprimeable number, because it can be changed into a prime (202120200102221) 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, 365362090 + ... + 365914876.

It is an arithmetic number, because the mean of its divisors is an integer number (14580153867960).

Almost surely, 2^{202120200102121} is an apocalyptic number.

It is an amenable number.

202120200102121 is a deficient number, since it is larger than the sum of its proper divisors (31162261785239).

202120200102121 is a wasteful number, since it uses less digits than its factorization.

202120200102121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1070064.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 202120200102121 its reverse (121201002021202), we get a palindrome (323321202123323).

The spelling of 202120200102121 in words is "two hundred two trillion, one hundred twenty billion, two hundred million, one hundred two thousand, one hundred twenty-one".