212021013011 has 4 divisors (see below), whose sum is σ = 214079469552. Its totient is φ = 209962556472.

The previous prime is 212021012911. The next prime is 212021013059. The reversal of 212021013011 is 110310120212.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212021013011 is a prime.

It is a super-2 number, since 2×212021013011² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212021013511) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1029228116 + ... + 1029228321.

It is an arithmetic number, because the mean of its divisors is an integer number (53519867388).

Almost surely, 2^212021013011 is an apocalyptic number.

212021013011 is a deficient number, since it is larger than the sum of its proper divisors (2058456541).

212021013011 is a wasteful number, since it uses less digits than its factorization.

212021013011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2058456540.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 212021013011 its reverse (110310120212), we get a palindrome (322331133223).

The spelling of 212021013011 in words is "two hundred twelve billion, twenty-one million, thirteen thousand, eleven".