101201210220221 has 4 divisors (see below), whose sum is σ = 101202710609532. Its totient is φ = 101199709830912.

The previous prime is 101201210220217. The next prime is 101201210220223. The reversal of 101201210220221 is 122022012102101.

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 16284340168996 + 84916870051225 = 4035386^2 + 9215035^2 .

It is a cyclic number.

It is not a de Polignac number, because 101201210220221 - 2² = 101201210220217 is a prime.

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 101201210220221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101201210220223) 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, 750093476 + ... + 750228381.

It is an arithmetic number, because the mean of its divisors is an integer number (25300677652383).

Almost surely, 2^{101201210220221} is an apocalyptic number.

It is an amenable number.

101201210220221 is a deficient number, since it is larger than the sum of its proper divisors (1500389311).

101201210220221 is an equidigital number, since it uses as much as digits as its factorization.

101201210220221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1500389310.

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

Adding to 101201210220221 its reverse (122022012102101), we get a palindrome (223223222322322).

The spelling of 101201210220221 in words is "one hundred one trillion, two hundred one billion, two hundred ten million, two hundred twenty thousand, two hundred twenty-one".