21012101111202 has 16 divisors (see below), whose sum is σ = 43001509251360. Its totient is φ = 6841149198912.

The previous prime is 21012101111201. The next prime is 21012101111227. The reversal of 21012101111202 is 20211110121012.

It is a happy number.

It is a super-3 number, since 3×21012101111202³ (a number of 41 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (21012101111201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40721125927 + ... + 40721126442.

It is an arithmetic number, because the mean of its divisors is an integer number (2687594328210).

Almost surely, 2^{21012101111202} is an apocalyptic number.

21012101111202 is an abundant number, since it is smaller than the sum of its proper divisors (21989408140158).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21012101111202 is a wasteful number, since it uses less digits than its factorization.

21012101111202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81442252417.

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

Adding to 21012101111202 its reverse (20211110121012), we get a palindrome (41223211232214).

The spelling of 21012101111202 in words is "twenty-one trillion, twelve billion, one hundred one million, one hundred eleven thousand, two hundred two".