21011210211201 has 32 divisors (see below), whose sum is σ = 32426868049920. Its totient is φ = 11853153181056.

The previous prime is 21011210211191. The next prime is 21011210211221. The reversal of 21011210211201 is 10211201211012.

It is a happy number.

It is not a de Polignac number, because 21011210211201 - 2¹⁵ = 21011210178433 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21011210211221) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7478511 + ... + 9896996.

It is an arithmetic number, because the mean of its divisors is an integer number (1013339626560).

Almost surely, 2^{21011210211201} is an apocalyptic number.

21011210211201 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

21011210211201 is a deficient number, since it is larger than the sum of its proper divisors (11415657838719).

21011210211201 is a wasteful number, since it uses less digits than its factorization.

21011210211201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17376253.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 21011210211201 its reverse (10211201211012), we get a palindrome (31222411422213).

The spelling of 21011210211201 in words is "twenty-one trillion, eleven billion, two hundred ten million, two hundred eleven thousand, two hundred one".