121122021202111 has 4 divisors (see below), whose sum is σ = 121125682391112. Its totient is φ = 121118360013112.

The previous prime is 121122021202099. The next prime is 121122021202289. The reversal of 121122021202111 is 111202120221121.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 121122021202111 - 2¹⁵ = 121122021169343 is a prime.

It is a super-2 number, since 2×121122021202111² (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 (121122021200111) 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, 1830544876 + ... + 1830611041.

It is an arithmetic number, because the mean of its divisors is an integer number (30281420597778).

Almost surely, 2^{121122021202111} is an apocalyptic number.

121122021202111 is a deficient number, since it is larger than the sum of its proper divisors (3661189001).

121122021202111 is an equidigital number, since it uses as much as digits as its factorization.

121122021202111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3661189000.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 121122021202111 its reverse (111202120221121), we get a palindrome (232324141423232).

The spelling of 121122021202111 in words is "one hundred twenty-one trillion, one hundred twenty-two billion, twenty-one million, two hundred two thousand, one hundred eleven".