21110101210122 has 16 divisors (see below), whose sum is σ = 42221112131520. Its totient is φ = 7036548784832.

The previous prime is 21110101210103. The next prime is 21110101210129. The reversal of 21110101210122 is 22101210101112.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (21110101210129) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37602783 + ... + 38160050.

It is an arithmetic number, because the mean of its divisors is an integer number (2638819508220).

Almost surely, 2^{21110101210122} is an apocalyptic number.

21110101210122 is an abundant number, since it is smaller than the sum of its proper divisors (21111010921398).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21110101210122 is a wasteful number, since it uses less digits than its factorization.

21110101210122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75809277.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 21110101210122 its reverse (22101210101112), we get a palindrome (43211311311234).

The spelling of 21110101210122 in words is "twenty-one trillion, one hundred ten billion, one hundred one million, two hundred ten thousand, one hundred twenty-two".