121223012032111 has 16 divisors (see below), whose sum is σ = 132419671505568. Its totient is φ = 110055755891200.

The previous prime is 121223012032061. The next prime is 121223012032151. The reversal of 121223012032111 is 111230210322121.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 121223012032111 - 2³¹ = 121220864548463 is a prime.

It is a super-2 number, since 2×121223012032111² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121223012032151) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 552317685 + ... + 552537121.

It is an arithmetic number, because the mean of its divisors is an integer number (8276229469098).

Almost surely, 2^{121223012032111} is an apocalyptic number.

121223012032111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

121223012032111 is a deficient number, since it is larger than the sum of its proper divisors (11196659473457).

121223012032111 is a wasteful number, since it uses less digits than its factorization.

121223012032111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 286202.

The product of its (nonzero) digits is 288, while the sum is 22.

Adding to 121223012032111 its reverse (111230210322121), we get a palindrome (232453222354232).

The spelling of 121223012032111 in words is "one hundred twenty-one trillion, two hundred twenty-three billion, twelve million, thirty-two thousand, one hundred eleven".