201011211000021 has 64 divisors (see below), whose sum is σ = 281956266028800. Its totient is φ = 127256108728320.

The previous prime is 201011210999959. The next prime is 201011211000029. The reversal of 201011211000021 is 120000112110102.

It is not a de Polignac number, because 201011211000021 - 2³³ = 201002621065429 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 201011210999970 and 201011211000006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201011211000029) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 374438805 + ... + 374975253.

It is an arithmetic number, because the mean of its divisors is an integer number (4405566656700).

Almost surely, 2^{201011211000021} is an apocalyptic number.

It is an amenable number.

201011211000021 is a deficient number, since it is larger than the sum of its proper divisors (80945055028779).

201011211000021 is a wasteful number, since it uses less digits than its factorization.

201011211000021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 537046.

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

Adding to 201011211000021 its reverse (120000112110102), we get a palindrome (321011323110123).

The spelling of 201011211000021 in words is "two hundred one trillion, eleven billion, two hundred eleven million, twenty-one", and thus it is an aban number.