202121101120101 has 4 divisors (see below), whose sum is σ = 269494801493472. Its totient is φ = 134747400746732.

The previous prime is 202121101120097. The next prime is 202121101120111. The reversal of 202121101120101 is 101021101121202.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 202121101120101 - 2² = 202121101120097 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202121101120111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33686850186681 + ... + 33686850186686.

It is an arithmetic number, because the mean of its divisors is an integer number (67373700373368).

Almost surely, 2^{202121101120101} is an apocalyptic number.

It is an amenable number.

202121101120101 is a deficient number, since it is larger than the sum of its proper divisors (67373700373371).

202121101120101 is an equidigital number, since it uses as much as digits as its factorization.

202121101120101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67373700373370.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 202121101120101 its reverse (101021101121202), we get a palindrome (303142202241303).

The spelling of 202121101120101 in words is "two hundred two trillion, one hundred twenty-one billion, one hundred one million, one hundred twenty thousand, one hundred one".