121012221311 has 4 divisors (see below), whose sum is σ = 123586949472. Its totient is φ = 118437493152.

The previous prime is 121012221299. The next prime is 121012221329. The reversal of 121012221311 is 113122210121.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 113122210121 = 61 ⋅1854462461.

It is a cyclic number.

It is not a de Polignac number, because 121012221311 - 2⁶ = 121012221247 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 121012221311.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121012221361) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1287364010 + ... + 1287364103.

It is an arithmetic number, because the mean of its divisors is an integer number (30896737368).

Almost surely, 2^121012221311 is an apocalyptic number.

121012221311 is a deficient number, since it is larger than the sum of its proper divisors (2574728161).

121012221311 is an equidigital number, since it uses as much as digits as its factorization.

121012221311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2574728160.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 121012221311 its reverse (113122210121), we get a palindrome (234134431432).

The spelling of 121012221311 in words is "one hundred twenty-one billion, twelve million, two hundred twenty-one thousand, three hundred eleven".