21022041255 has 16 divisors (see below), whose sum is σ = 33676154880. Its totient is φ = 11198125728.

The previous prime is 21022041251. The next prime is 21022041263. The reversal of 21022041255 is 55214022012.

It is not a de Polignac number, because 21022041255 - 2² = 21022041251 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21022041251) 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, 839095 + ... + 863784.

It is an arithmetic number, because the mean of its divisors is an integer number (2104759680).

Almost surely, 2^21022041255 is an apocalyptic number.

21022041255 is a deficient number, since it is larger than the sum of its proper divisors (12654113625).

21022041255 is a wasteful number, since it uses less digits than its factorization.

21022041255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1703710.

The product of its (nonzero) digits is 1600, while the sum is 24.

Adding to 21022041255 its reverse (55214022012), we get a palindrome (76236063267).

The spelling of 21022041255 in words is "twenty-one billion, twenty-two million, forty-one thousand, two hundred fifty-five".