212111212121011 has 32 divisors (see below), whose sum is σ = 271931020738560. Its totient is φ = 161246597234976.

The previous prime is 212111212120991. The next prime is 212111212121023. The reversal of 212111212121011 is 110121212111212.

It is not a de Polignac number, because 212111212121011 - 2⁹ = 212111212120499 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a self number, because there is not a number n which added to its sum of digits gives 212111212121011.

It is not an unprimeable number, because it can be changed into a prime (212111212127011) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 737516331 + ... + 737803876.

It is an arithmetic number, because the mean of its divisors is an integer number (8497844398080).

Almost surely, 2^{212111212121011} is an apocalyptic number.

212111212121011 is a deficient number, since it is larger than the sum of its proper divisors (59819808617549).

212111212121011 is a wasteful number, since it uses less digits than its factorization.

212111212121011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1475320303.

The product of its (nonzero) digits is 32, while the sum is 19.

Adding to 212111212121011 its reverse (110121212111212), we get a palindrome (322232424232223).

The spelling of 212111212121011 in words is "two hundred twelve trillion, one hundred eleven billion, two hundred twelve million, one hundred twenty-one thousand, eleven".