121101020221 has 8 divisors (see below), whose sum is σ = 125374145400. Its totient is φ = 116834376960.

The previous prime is 121101020219. The next prime is 121101020237. The reversal of 121101020221 is 122020101121.

It can be written as a sum of positive squares in 4 ways, for example, as 7490902500 + 113610117721 = 86550^2 + 337061^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 121101020221 - 2¹ = 121101020219 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121101020321) 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, 1582440 + ... + 1657201.

It is an arithmetic number, because the mean of its divisors is an integer number (15671768175).

Almost surely, 2^121101020221 is an apocalyptic number.

It is an amenable number.

121101020221 is a deficient number, since it is larger than the sum of its proper divisors (4273125179).

121101020221 is a wasteful number, since it uses less digits than its factorization.

121101020221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3240959.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 121101020221 its reverse (122020101121), we get a palindrome (243121121342).

The spelling of 121101020221 in words is "one hundred twenty-one billion, one hundred one million, twenty thousand, two hundred twenty-one".