21111021000010 has 16 divisors (see below), whose sum is σ = 38001898525536. Its totient is φ = 8443950461008.

The previous prime is 21111020999947. The next prime is 21111021000059. The reversal of 21111021000010 is 1000012011112.

It is a Harshad number since it is a multiple of its sum of digits (10).

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, 57048724 + ... + 57417583.

It is an arithmetic number, because the mean of its divisors is an integer number (2375118657846).

Almost surely, 2^{21111021000010} is an apocalyptic number.

21111021000010 is a deficient number, since it is larger than the sum of its proper divisors (16890877525526).

21111021000010 is a wasteful number, since it uses less digits than its factorization.

21111021000010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114484757.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 21111021000010 its reverse (1000012011112), we get a palindrome (22111033011122).

The spelling of 21111021000010 in words is "twenty-one trillion, one hundred eleven billion, twenty-one million, ten", and thus it is an aban number.