210201110000021 has 24 divisors (see below), whose sum is σ = 248076449328960. Its totient is φ = 177570509522112.

The previous prime is 210201110000009. The next prime is 210201110000027. The reversal of 210201110000021 is 120000011102012.

It is not a de Polignac number, because 210201110000021 - 2⁶ = 210201109999957 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 210201109999957 and 210201110000011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210201110000027) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 111701945 + ... + 113568158.

It is an arithmetic number, because the mean of its divisors is an integer number (10336518722040).

Almost surely, 2^{210201110000021} is an apocalyptic number.

It is an amenable number.

210201110000021 is a deficient number, since it is larger than the sum of its proper divisors (37875339328939).

210201110000021 is a wasteful number, since it uses less digits than its factorization.

210201110000021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225270393 (or 225270386 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 210201110000021 its reverse (120000011102012), we get a palindrome (330201121102033).

The spelling of 210201110000021 in words is "two hundred ten trillion, two hundred one billion, one hundred ten million, twenty-one", and thus it is an aban number.