20261121 has 4 divisors (see below), whose sum is σ = 27014832. Its totient is φ = 13507412.

The previous prime is 20261119. The next prime is 20261123. The reversal of 20261121 is 12116202.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (20261119) and next prime (20261123).

It is a cyclic number.

It is not a de Polignac number, because 20261121 - 2¹ = 20261119 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20261121.

It is not an unprimeable number, because it can be changed into a prime (20261123) 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, 3376851 + ... + 3376856.

It is an arithmetic number, because the mean of its divisors is an integer number (6753708).

Almost surely, 2^20261121 is an apocalyptic number.

It is an amenable number.

20261121 is a deficient number, since it is larger than the sum of its proper divisors (6753711).

20261121 is an equidigital number, since it uses as much as digits as its factorization.

20261121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6753710.

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 20261121 is about 4501.2354970608. The cubic root of 20261121 is about 272.6179765789.

Adding to 20261121 its reverse (12116202), we get a palindrome (32377323).

The spelling of 20261121 in words is "twenty million, two hundred sixty-one thousand, one hundred twenty-one".