52121111 has 4 divisors (see below), whose sum is σ = 59566992. Its totient is φ = 44675232.

The previous prime is 52121093. The next prime is 52121141. The reversal of 52121111 is 11112125.

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

It is not a de Polignac number, because 52121111 - 2²² = 47926807 is a prime.

It is a super-2 number, since 2×52121111² = 5433220423748642, which 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 (52121141) 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, 3722930 + ... + 3722943.

It is an arithmetic number, because the mean of its divisors is an integer number (14891748).

Almost surely, 2^52121111 is an apocalyptic number.

52121111 is a deficient number, since it is larger than the sum of its proper divisors (7445881).

52121111 is an equidigital number, since it uses as much as digits as its factorization.

52121111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7445880.

The product of its digits is 20, while the sum is 14.

The square root of 52121111 is about 7219.4952039599. The cubic root of 52121111 is about 373.5406654659.

Adding to 52121111 its reverse (11112125), we get a palindrome (63233236).

The spelling of 52121111 in words is "fifty-two million, one hundred twenty-one thousand, one hundred eleven".