121111251121 has 8 divisors (see below), whose sum is σ = 138438387584. Its totient is φ = 103790496960.

The previous prime is 121111251119. The next prime is 121111251127. The reversal of 121111251121 is 121152111121.

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 121111251121 - 2¹ = 121111251119 is a prime.

It is a super-3 number, since 3×121111251121³ (a number of 34 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (121111251127) 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, 1554840 + ... + 1630873.

It is an arithmetic number, because the mean of its divisors is an integer number (17304798448).

Almost surely, 2^121111251121 is an apocalyptic number.

It is an amenable number.

121111251121 is a deficient number, since it is larger than the sum of its proper divisors (17327136463).

121111251121 is an equidigital number, since it uses as much as digits as its factorization.

121111251121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3191151.

The product of its digits is 40, while the sum is 19.

Adding to 121111251121 its reverse (121152111121), we get a palindrome (242263362242).

The spelling of 121111251121 in words is "one hundred twenty-one billion, one hundred eleven million, two hundred fifty-one thousand, one hundred twenty-one".