21202111010204 has 24 divisors (see below), whose sum is σ = 37149970536000. Its totient is φ = 10587836413440.

The previous prime is 21202111010167. The next prime is 21202111010219. The reversal of 21202111010204 is 40201011120212.

It is a super-2 number, since 2×21202111010204² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

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, 31556237 + ... + 32221115.

It is an arithmetic number, because the mean of its divisors is an integer number (1547915439000).

Almost surely, 2^{21202111010204} is an apocalyptic number.

It is an amenable number.

21202111010204 is a deficient number, since it is larger than the sum of its proper divisors (15947859525796).

21202111010204 is a wasteful number, since it uses less digits than its factorization.

21202111010204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 674813 (or 674811 counting only the distinct ones).

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

Adding to 21202111010204 its reverse (40201011120212), we get a palindrome (61403122130416).

The spelling of 21202111010204 in words is "twenty-one trillion, two hundred two billion, one hundred eleven million, ten thousand, two hundred four".