121012101221 has 8 divisors (see below), whose sum is σ = 138961264800. Its totient is φ = 104220948240.

The previous prime is 121012101191. The next prime is 121012101251. The reversal of 121012101221 is 122101210121.

It is an interprime number because it is at equal distance from previous prime (121012101191) and next prime (121012101251).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121012101221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121012101196 and 121012101205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121012101251) 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, 289502426 + ... + 289502843.

It is an arithmetic number, because the mean of its divisors is an integer number (17370158100).

Almost surely, 2^121012101221 is an apocalyptic number.

121012101221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

121012101221 is a deficient number, since it is larger than the sum of its proper divisors (17949163579).

121012101221 is a wasteful number, since it uses less digits than its factorization.

121012101221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 579005299.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 121012101221 its reverse (122101210121), we get a palindrome (243113311342).

The spelling of 121012101221 in words is "one hundred twenty-one billion, twelve million, one hundred one thousand, two hundred twenty-one".