121022111221 has 8 divisors (see below), whose sum is σ = 136576677600. Its totient is φ = 106226304240.

The previous prime is 121022111191. The next prime is 121022111281. The reversal of 121022111221 is 122111220121.

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

It is a cyclic number.

It is not a de Polignac number, because 121022111221 - 2³³ = 112432176629 is a prime.

It is a super-2 number, since 2×121022111221² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 121022111195 and 121022111204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121022111281) 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, 189689511 + ... + 189690148.

It is an arithmetic number, because the mean of its divisors is an integer number (17072084700).

Almost surely, 2^121022111221 is an apocalyptic number.

121022111221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

121022111221 is a deficient number, since it is larger than the sum of its proper divisors (15554566379).

121022111221 is a wasteful number, since it uses less digits than its factorization.

121022111221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 379379699.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 121022111221 its reverse (122111220121), we get a palindrome (243133331342).

The spelling of 121022111221 in words is "one hundred twenty-one billion, twenty-two million, one hundred eleven thousand, two hundred twenty-one".