21110001201212 has 48 divisors (see below), whose sum is σ = 46134820757760. Its totient is φ = 8210990736000.

The previous prime is 21110001201151. The next prime is 21110001201269. The reversal of 21110001201212 is 21210210001112.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 56835662 + ... + 57205877.

It is an arithmetic number, because the mean of its divisors is an integer number (961142099120).

Almost surely, 2^{21110001201212} is an apocalyptic number.

21110001201212 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21110001201212 is an abundant number, since it is smaller than the sum of its proper divisors (25024819556548).

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

21110001201212 is a wasteful number, since it uses less digits than its factorization.

21110001201212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114042162 (or 114042160 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 21110001201212 its reverse (21210210001112), we get a palindrome (42320211202324).

The spelling of 21110001201212 in words is "twenty-one trillion, one hundred ten billion, one million, two hundred one thousand, two hundred twelve".