21122121095 has 32 divisors (see below), whose sum is σ = 26418683904. Its totient is φ = 16194297600.

The previous prime is 21122121091. The next prime is 21122121101. The reversal of 21122121095 is 59012122112.

It is not a de Polignac number, because 21122121095 - 2² = 21122121091 is a prime.

It is a super-2 number, since 2×21122121095² (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 (21122121091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7906610 + ... + 7909280.

It is an arithmetic number, because the mean of its divisors is an integer number (825583872).

Almost surely, 2^21122121095 is an apocalyptic number.

21122121095 is a deficient number, since it is larger than the sum of its proper divisors (5296562809).

21122121095 is a wasteful number, since it uses less digits than its factorization.

21122121095 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3183.

The product of its (nonzero) digits is 720, while the sum is 26.

The spelling of 21122121095 in words is "twenty-one billion, one hundred twenty-two million, one hundred twenty-one thousand, ninety-five".