21011002010122 has 16 divisors (see below), whose sum is σ = 31543515751680. Its totient is φ = 10496498086368.

The previous prime is 21011002010113. The next prime is 21011002010143. The reversal of 21011002010122 is 22101020011012.

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, 32021383 + ... + 32670949.

It is an arithmetic number, because the mean of its divisors is an integer number (1971469734480).

Almost surely, 2^{21011002010122} is an apocalyptic number.

21011002010122 is a deficient number, since it is larger than the sum of its proper divisors (10532513741558).

21011002010122 is a wasteful number, since it uses less digits than its factorization.

21011002010122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 663405.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 21011002010122 its reverse (22101020011012), we get a palindrome (43112022021134).

The spelling of 21011002010122 in words is "twenty-one trillion, eleven billion, two million, ten thousand, one hundred twenty-two".