21010211112 has 32 divisors (see below), whose sum is σ = 57300576480. Its totient is φ = 6366730560.

The previous prime is 21010211083. The next prime is 21010211137. The reversal of 21010211112 is 21111201012.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39791803 + ... + 39792330.

It is an arithmetic number, because the mean of its divisors is an integer number (1790643015).

Almost surely, 2^21010211112 is an apocalyptic number.

21010211112 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21010211112 is an abundant number, since it is smaller than the sum of its proper divisors (36290365368).

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

21010211112 is a wasteful number, since it uses less digits than its factorization.

21010211112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79584153 (or 79584149 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 21010211112 its reverse (21111201012), we get a palindrome (42121412124).

The spelling of 21010211112 in words is "twenty-one billion, ten million, two hundred eleven thousand, one hundred twelve".