121001101221 has 144 divisors (see below), whose sum is σ = 228176212992. Its totient is φ = 56450338560.

The previous prime is 121001101217. The next prime is 121001101259. The reversal of 121001101221 is 122101100121.

It is not a de Polignac number, because 121001101221 - 2² = 121001101217 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121001101197 and 121001101206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121001101721) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 8548476 + ... + 8562618.

Almost surely, 2^121001101221 is an apocalyptic number.

121001101221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

121001101221 is a deficient number, since it is larger than the sum of its proper divisors (107175111771).

121001101221 is a wasteful number, since it uses less digits than its factorization.

121001101221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14232 (or 14214 counting only the distinct ones).

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

Adding to 121001101221 its reverse (122101100121), we get a palindrome (243102201342).

It can be divided in two parts, 121001 and 101221, that added together give a palindrome (222222).

The spelling of 121001101221 in words is "one hundred twenty-one billion, one million, one hundred one thousand, two hundred twenty-one".