21011002121122 has 48 divisors (see below), whose sum is σ = 34321749727680. Its totient is φ = 9642154766400.

The previous prime is 21011002121023. The next prime is 21011002121147. The reversal of 21011002121122 is 22112120011012.

It is a junction number, because it is equal to n+sod(n) for n = 21011002121096 and 21011002121105.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 923914672 + ... + 923937412.

It is an arithmetic number, because the mean of its divisors is an integer number (715036452660).

Almost surely, 2^{21011002121122} is an apocalyptic number.

21011002121122 is a deficient number, since it is larger than the sum of its proper divisors (13310747606558).

21011002121122 is a wasteful number, since it uses less digits than its factorization.

21011002121122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38219 (or 38206 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 21011002121122 its reverse (22112120011012), we get a palindrome (43123122132134).

The spelling of 21011002121122 in words is "twenty-one trillion, eleven billion, two million, one hundred twenty-one thousand, one hundred twenty-two".