121010110221 has 64 divisors (see below), whose sum is σ = 216925986816. Its totient is φ = 57948480000.

The previous prime is 121010110219. The next prime is 121010110303. The reversal of 121010110221 is 122011010121.

It is not a de Polignac number, because 121010110221 - 2¹ = 121010110219 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121010110197 and 121010110206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121010110121) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2228425 + ... + 2282081.

It is an arithmetic number, because the mean of its divisors is an integer number (3389468544).

Almost surely, 2^121010110221 is an apocalyptic number.

121010110221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

121010110221 is a deficient number, since it is larger than the sum of its proper divisors (95915876595).

121010110221 is a wasteful number, since it uses less digits than its factorization.

121010110221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54442.

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

Adding to 121010110221 its reverse (122011010121), we get a palindrome (243021120342).

The spelling of 121010110221 in words is "one hundred twenty-one billion, ten million, one hundred ten thousand, two hundred twenty-one".