211112011210021 has 16 divisors (see below), whose sum is σ = 216651742718400. Its totient is φ = 205601555174400.

The previous prime is 211112011210019. The next prime is 211112011210057. The reversal of 211112011210021 is 120012110211112.

It is a cyclic number.

It is not a de Polignac number, because 211112011210021 - 2¹ = 211112011210019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 211112011209977 and 211112011210004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211112011216021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24290346 + ... + 31815796.

It is an arithmetic number, because the mean of its divisors is an integer number (13540733919900).

Almost surely, 2^{211112011210021} is an apocalyptic number.

It is an amenable number.

211112011210021 is a deficient number, since it is larger than the sum of its proper divisors (5539731508379).

211112011210021 is a wasteful number, since it uses less digits than its factorization.

211112011210021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7527396.

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

Adding to 211112011210021 its reverse (120012110211112), we get a palindrome (331124121421133).

The spelling of 211112011210021 in words is "two hundred eleven trillion, one hundred twelve billion, eleven million, two hundred ten thousand, twenty-one".