21020112011002 has 64 divisors (see below), whose sum is σ = 34749541209600. Its totient is φ = 9475611863040.

The previous prime is 21020112010999. The next prime is 21020112011033. The reversal of 21020112011002 is 20011021102012.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1275406602 + ... + 1275423082.

It is an arithmetic number, because the mean of its divisors is an integer number (542961581400).

Almost surely, 2^{21020112011002} is an apocalyptic number.

21020112011002 is a deficient number, since it is larger than the sum of its proper divisors (13729429198598).

21020112011002 is a wasteful number, since it uses less digits than its factorization.

21020112011002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18631.

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

Adding to 21020112011002 its reverse (20011021102012), we get a palindrome (41031133113014).

The spelling of 21020112011002 in words is "twenty-one trillion, twenty billion, one hundred twelve million, eleven thousand, two".