21211411212 has 18 divisors (see below), whose sum is σ = 53617733988. Its totient is φ = 7070470392.

The previous prime is 21211411181. The next prime is 21211411253.

21211411212 is a `hidden beast` number, since 21 + 21 + 1 + 411 + 212 = 666.

21211411212 is nontrivially palindromic in base 10.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 294602898 + ... + 294602969.

Almost surely, 2^21211411212 is an apocalyptic number.

It is an amenable number.

21211411212 is an abundant number, since it is smaller than the sum of its proper divisors (32406322776).

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

21211411212 is a wasteful number, since it uses less digits than its factorization.

21211411212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 589205877 (or 589205872 counting only the distinct ones).

The product of its digits is 64, while the sum is 18.

The spelling of 21211411212 in words is "twenty-one billion, two hundred eleven million, four hundred eleven thousand, two hundred twelve".