211111021012 has 48 divisors (see below), whose sum is σ = 389905915392. Its totient is φ = 99818611200.

The previous prime is 211111021003. The next prime is 211111021021. The reversal of 211111021012 is 210120111112.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (211111021003) and next prime (211111021021).

It is a junction number, because it is equal to n+sod(n) for n = 211111020983 and 211111021001.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4101637 + ... + 4152787.

It is an arithmetic number, because the mean of its divisors is an integer number (8123039904).

Almost surely, 2^211111021012 is an apocalyptic number.

It is an amenable number.

211111021012 is a deficient number, since it is larger than the sum of its proper divisors (178794894380).

211111021012 is a wasteful number, since it uses less digits than its factorization.

211111021012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51688 (or 51686 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 211111021012 its reverse (210120111112), we get a palindrome (421231132124).

The spelling of 211111021012 in words is "two hundred eleven billion, one hundred eleven million, twenty-one thousand, twelve".