21050310220135 has 16 divisors (see below), whose sum is σ = 28902683025216. Its totient is φ = 14417655360768.

The previous prime is 21050310220117. The next prime is 21050310220157. The reversal of 21050310220135 is 53102201305012.

It is a cyclic number.

It is not a de Polignac number, because 21050310220135 - 2¹¹ = 21050310218087 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 350866992 + ... + 350926981.

It is an arithmetic number, because the mean of its divisors is an integer number (1806417689076).

Almost surely, 2^{21050310220135} is an apocalyptic number.

21050310220135 is a deficient number, since it is larger than the sum of its proper divisors (7852372805081).

21050310220135 is an equidigital number, since it uses as much as digits as its factorization.

21050310220135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 701794842.

The product of its (nonzero) digits is 1800, while the sum is 25.

Adding to 21050310220135 its reverse (53102201305012), we get a palindrome (74152511525147).

The spelling of 21050310220135 in words is "twenty-one trillion, fifty billion, three hundred ten million, two hundred twenty thousand, one hundred thirty-five".