21101222011004 has 12 divisors (see below), whose sum is σ = 36932965790784. Its totient is φ = 10548946070784.

The previous prime is 21101222010961. The next prime is 21101222011007. The reversal of 21101222011004 is 40011022210112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21101222011007) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 416205164 + ... + 416255859.

It is an arithmetic number, because the mean of its divisors is an integer number (3077747149232).

Almost surely, 2^{21101222011004} is an apocalyptic number.

It is an amenable number.

21101222011004 is a deficient number, since it is larger than the sum of its proper divisors (15831743779780).

21101222011004 is a wasteful number, since it uses less digits than its factorization.

21101222011004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 832467364 (or 832467362 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 21101222011004 its reverse (40011022210112), we get a palindrome (61112244221116).

The spelling of 21101222011004 in words is "twenty-one trillion, one hundred one billion, two hundred twenty-two million, eleven thousand, four".