201221212022101 has 8 divisors (see below), whose sum is σ = 222321134510784. Its totient is φ = 181150554045120.

The previous prime is 201221212022099. The next prime is 201221212022123. The reversal of 201221212022101 is 101220212122102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 201221212022101 - 2¹ = 201221212022099 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201221212022801) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 257316127515 + ... + 257316128296.

It is an arithmetic number, because the mean of its divisors is an integer number (27790141813848).

Almost surely, 2^{201221212022101} is an apocalyptic number.

It is an amenable number.

201221212022101 is a deficient number, since it is larger than the sum of its proper divisors (21099922488683).

201221212022101 is a wasteful number, since it uses less digits than its factorization.

201221212022101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 514632255851.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 201221212022101 its reverse (101220212122102), we get a palindrome (302441424144203).

The spelling of 201221212022101 in words is "two hundred one trillion, two hundred twenty-one billion, two hundred twelve million, twenty-two thousand, one hundred one".