21111020011002 has 16 divisors (see below), whose sum is σ = 42233460688512. Its totient is φ = 7035103225920.

The previous prime is 21111020011001. The next prime is 21111020011057. The reversal of 21111020011002 is 20011002011112.

It is not an unprimeable number, because it can be changed into a prime (21111020011001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 475837074 + ... + 475881437.

It is an arithmetic number, because the mean of its divisors is an integer number (2639591293032).

Almost surely, 2^{21111020011002} is an apocalyptic number.

21111020011002 is an abundant number, since it is smaller than the sum of its proper divisors (21122440677510).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21111020011002 is a wasteful number, since it uses less digits than its factorization.

21111020011002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 951722213.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 21111020011002 its reverse (20011002011112), we get a palindrome (41122022022114).

The spelling of 21111020011002 in words is "twenty-one trillion, one hundred eleven billion, twenty million, eleven thousand, two".