202121100097 has 16 divisors (see below), whose sum is σ = 239397064704. Its totient is φ = 166990050000.

The previous prime is 202121100067. The next prime is 202121100101. The reversal of 202121100097 is 790001121202.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-202121100097 is a prime.

It is not an unprimeable number, because it can be changed into a prime (202121100067) 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, 1800979 + ... + 1909912.

It is an arithmetic number, because the mean of its divisors is an integer number (14962316544).

Almost surely, 2^202121100097 is an apocalyptic number.

It is an amenable number.

202121100097 is a deficient number, since it is larger than the sum of its proper divisors (37275964607).

202121100097 is a wasteful number, since it uses less digits than its factorization.

202121100097 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3711180.

The product of its (nonzero) digits is 504, while the sum is 25.

Adding to 202121100097 its reverse (790001121202), we get a palindrome (992122221299).

The spelling of 202121100097 in words is "two hundred two billion, one hundred twenty-one million, one hundred thousand, ninety-seven".