121010213311221 has 32 divisors (see below), whose sum is σ = 187565132885760. Its totient is φ = 68773882028544.

The previous prime is 121010213311219. The next prime is 121010213311237. The reversal of 121010213311221 is 122113312010121.

It is not a de Polignac number, because 121010213311221 - 2¹ = 121010213311219 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121010213311261) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2325930496 + ... + 2325982521.

It is an arithmetic number, because the mean of its divisors is an integer number (5861410402680).

Almost surely, 2^{121010213311221} is an apocalyptic number.

It is an amenable number.

121010213311221 is a deficient number, since it is larger than the sum of its proper divisors (66554919574539).

121010213311221 is a wasteful number, since it uses less digits than its factorization.

121010213311221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4651913085.

The product of its (nonzero) digits is 144, while the sum is 21.

Adding to 121010213311221 its reverse (122113312010121), we get a palindrome (243123525321342).

The spelling of 121010213311221 in words is "one hundred twenty-one trillion, ten billion, two hundred thirteen million, three hundred eleven thousand, two hundred twenty-one".