21120261341 has 16 divisors (see below), whose sum is σ = 21763413504. Its totient is φ = 20486628864.

The previous prime is 21120261277. The next prime is 21120261353. The reversal of 21120261341 is 14316202112.

It is a cyclic number.

It is not a de Polignac number, because 21120261341 - 2⁶ = 21120261277 is a prime.

It is a super-2 number, since 2×21120261341² (a number of 21 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 (21120261391) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7314200 + ... + 7317086.

It is an arithmetic number, because the mean of its divisors is an integer number (1360213344).

Almost surely, 2^21120261341 is an apocalyptic number.

It is an amenable number.

21120261341 is a deficient number, since it is larger than the sum of its proper divisors (643152163).

21120261341 is a wasteful number, since it uses less digits than its factorization.

21120261341 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4460.

The product of its (nonzero) digits is 576, while the sum is 23.

Adding to 21120261341 its reverse (14316202112), we get a palindrome (35436463453).

The spelling of 21120261341 in words is "twenty-one billion, one hundred twenty million, two hundred sixty-one thousand, three hundred forty-one".