21101122110115 has 16 divisors (see below), whose sum is σ = 25567695369216. Its totient is φ = 16716671676000.

The previous prime is 21101122110067. The next prime is 21101122110119. The reversal of 21101122110115 is 51101122110112.

It is not a de Polignac number, because 21101122110115 - 2⁹ = 21101122109603 is a prime.

It is a super-2 number, since 2×21101122110115² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21101122110092 and 21101122110101.

It is not an unprimeable number, because it can be changed into a prime (21101122110119) 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, 27217090 + ... + 27981640.

It is an arithmetic number, because the mean of its divisors is an integer number (1597980960576).

Almost surely, 2^{21101122110115} is an apocalyptic number.

21101122110115 is a deficient number, since it is larger than the sum of its proper divisors (4466573259101).

21101122110115 is a wasteful number, since it uses less digits than its factorization.

21101122110115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 818250.

The product of its (nonzero) digits is 40, while the sum is 19.

Adding to 21101122110115 its reverse (51101122110112), we get a palindrome (72202244220227).

The spelling of 21101122110115 in words is "twenty-one trillion, one hundred one billion, one hundred twenty-two million, one hundred ten thousand, one hundred fifteen".