21011102121122 has 8 divisors (see below), whose sum is σ = 31516742817216. Its totient is φ = 10505521182052.

The previous prime is 21011102121089. The next prime is 21011102121127. The reversal of 21011102121122 is 22112120111012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 21011102121122.

It is not an unprimeable number, because it can be changed into a prime (21011102121127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14049638 + ... + 15473025.

It is an arithmetic number, because the mean of its divisors is an integer number (3939592852152).

Almost surely, 2^{21011102121122} is an apocalyptic number.

21011102121122 is a deficient number, since it is larger than the sum of its proper divisors (10505640696094).

21011102121122 is a wasteful number, since it uses less digits than its factorization.

21011102121122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29878512.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 21011102121122 its reverse (22112120111012), we get a palindrome (43123222232134).

The spelling of 21011102121122 in words is "twenty-one trillion, eleven billion, one hundred two million, one hundred twenty-one thousand, one hundred twenty-two".