21020022112112 has 20 divisors (see below), whose sum is σ = 40733909670216. Its totient is φ = 10508045423040.

The previous prime is 21020022112057. The next prime is 21020022112129. The reversal of 21020022112112 is 21121122002012.

It is a super-3 number, since 3×21020022112112³ (a number of 41 digits) contains 333 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, 122763839 + ... + 122934942.

Almost surely, 2^{21020022112112} is an apocalyptic number.

It is an amenable number.

21020022112112 is a deficient number, since it is larger than the sum of its proper divisors (19713887558104).

21020022112112 is a wasteful number, since it uses less digits than its factorization.

21020022112112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245704136 (or 245704130 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 21020022112112 its reverse (21121122002012), we get a palindrome (42141144114124).

The spelling of 21020022112112 in words is "twenty-one trillion, twenty billion, twenty-two million, one hundred twelve thousand, one hundred twelve".