21304050101155 has 16 divisors (see below), whose sum is σ = 27068895352224. Its totient is φ = 16040566218240.

The previous prime is 21304050101141. The next prime is 21304050101177. The reversal of 21304050101155 is 55110105040312.

It is not a de Polignac number, because 21304050101155 - 2⁷ = 21304050101027 is a prime.

It is a Duffinian 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, 10231984 + ... + 12136786.

It is an arithmetic number, because the mean of its divisors is an integer number (1691805959514).

Almost surely, 2^{21304050101155} is an apocalyptic number.

21304050101155 is a deficient number, since it is larger than the sum of its proper divisors (5764845251069).

21304050101155 is a wasteful number, since it uses less digits than its factorization.

21304050101155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2036406.

The product of its (nonzero) digits is 3000, while the sum is 28.

Adding to 21304050101155 its reverse (55110105040312), we get a palindrome (76414155141467).

The spelling of 21304050101155 in words is "twenty-one trillion, three hundred four billion, fifty million, one hundred one thousand, one hundred fifty-five".