21010121121122 has 16 divisors (see below), whose sum is σ = 36205923013632. Its totient is φ = 8957194493280.

The previous prime is 21010121120971. The next prime is 21010121121151. The reversal of 21010121121122 is 22112112101012.

It is a self number, because there is not a number n which added to its sum of digits gives 21010121121122.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3928591403 + ... + 3928596750.

It is an arithmetic number, because the mean of its divisors is an integer number (2262870188352).

Almost surely, 2^{21010121121122} is an apocalyptic number.

21010121121122 is a deficient number, since it is larger than the sum of its proper divisors (15195801892510).

21010121121122 is a wasteful number, since it uses less digits than its factorization.

21010121121122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7857188353.

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

Adding to 21010121121122 its reverse (22112112101012), we get a palindrome (43122233222134).

The spelling of 21010121121122 in words is "twenty-one trillion, ten billion, one hundred twenty-one million, one hundred twenty-one thousand, one hundred twenty-two".