121011021021021 has 16 divisors (see below), whose sum is σ = 163296041319936. Its totient is φ = 79700055715376.

The previous prime is 121011021020993. The next prime is 121011021021047. The reversal of 121011021021021 is 120120120110121.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 121011021021021 - 2¹⁰ = 121011021019997 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121011021001021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4022206 + ... + 16068608.

It is an arithmetic number, because the mean of its divisors is an integer number (10206002582496).

Almost surely, 2^{121011021021021} is an apocalyptic number.

It is an amenable number.

121011021021021 is a deficient number, since it is larger than the sum of its proper divisors (42285020298915).

121011021021021 is a wasteful number, since it uses less digits than its factorization.

121011021021021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12086832.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 121011021021021 its reverse (120120120110121), we get a palindrome (241131141131142).

The spelling of 121011021021021 in words is "one hundred twenty-one trillion, eleven billion, twenty-one million, twenty-one thousand, twenty-one".