21021201121112 has 16 divisors (see below), whose sum is σ = 39612816186000. Its totient is φ = 10457783471520.

The previous prime is 21021201121097. The next prime is 21021201121127. The reversal of 21021201121112 is 21112110212012.

It is an interprime number because it is at equal distance from previous prime (21021201121097) and next prime (21021201121127).

It is a super-4 number, since 4×21021201121112⁴ (a number of 54 digits) contains 4444 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6602134439 + ... + 6602137622.

It is an arithmetic number, because the mean of its divisors is an integer number (2475801011625).

Almost surely, 2^{21021201121112} is an apocalyptic number.

It is an amenable number.

21021201121112 is a deficient number, since it is larger than the sum of its proper divisors (18591615064888).

21021201121112 is a wasteful number, since it uses less digits than its factorization.

21021201121112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13204272266 (or 13204272262 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 21021201121112 its reverse (21112110212012), we get a palindrome (42133311333124).

The spelling of 21021201121112 in words is "twenty-one trillion, twenty-one billion, two hundred one million, one hundred twenty-one thousand, one hundred twelve".