121221010101 has 8 divisors (see below), whose sum is σ = 171135543744. Its totient is φ = 76060241600.

The previous prime is 121221010087. The next prime is 121221010103. The reversal of 121221010101 is 101010122121.

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 121221010101 - 2⁹ = 121221009589 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121221010103) 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, 1188441225 + ... + 1188441326.

It is an arithmetic number, because the mean of its divisors is an integer number (21391942968).

Almost surely, 2^121221010101 is an apocalyptic number.

It is an amenable number.

121221010101 is a deficient number, since it is larger than the sum of its proper divisors (49914533643).

121221010101 is a wasteful number, since it uses less digits than its factorization.

121221010101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2376882571.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 121221010101 its reverse (101010122121), we get a palindrome (222231132222).

The spelling of 121221010101 in words is "one hundred twenty-one billion, two hundred twenty-one million, ten thousand, one hundred one".