121022221212111 has 8 divisors (see below), whose sum is σ = 161396460278064. Its totient is φ = 80664731477120.

The previous prime is 121022221212089. The next prime is 121022221212227. The reversal of 121022221212111 is 111212122220121.

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 121022221212111 - 2¹⁸ = 121022220949967 is a prime.

It is a super-2 number, since 2×121022221212111² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121022221212311) 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, 4187315880 + ... + 4187344781.

It is an arithmetic number, because the mean of its divisors is an integer number (20174557534758).

Almost surely, 2^{121022221212111} is an apocalyptic number.

121022221212111 is a deficient number, since it is larger than the sum of its proper divisors (40374239065953).

121022221212111 is an equidigital number, since it uses as much as digits as its factorization.

121022221212111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8374665481.

The product of its (nonzero) digits is 128, while the sum is 21.

Adding to 121022221212111 its reverse (111212122220121), we get a palindrome (232234343432232).

The spelling of 121022221212111 in words is "one hundred twenty-one trillion, twenty-two billion, two hundred twenty-one million, two hundred twelve thousand, one hundred eleven".