21112102211001 has 16 divisors (see below), whose sum is σ = 29809599341184. Its totient is φ = 13244907642624.

The previous prime is 21112102210937. The next prime is 21112102211023. The reversal of 21112102211001 is 10011220121112.

It is a happy number.

It is not a de Polignac number, because 21112102211001 - 2⁶ = 21112102210937 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21112102291001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29353510 + ... + 30064143.

It is an arithmetic number, because the mean of its divisors is an integer number (1863099958824).

Almost surely, 2^{21112102211001} is an apocalyptic number.

It is an amenable number.

21112102211001 is a deficient number, since it is larger than the sum of its proper divisors (8697497130183).

21112102211001 is a wasteful number, since it uses less digits than its factorization.

21112102211001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59424640.

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

Adding to 21112102211001 its reverse (10011220121112), we get a palindrome (31123322332113).

The spelling of 21112102211001 in words is "twenty-one trillion, one hundred twelve billion, one hundred two million, two hundred eleven thousand, one".