211211000120111 has 4 divisors (see below), whose sum is σ = 212628523611000. Its totient is φ = 209793476629224.

The previous prime is 211211000120083. The next prime is 211211000120119. The reversal of 211211000120111 is 111021000112112.

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

It is a cyclic number.

It is not a de Polignac number, because 211211000120111 - 2¹⁸ = 211210999857967 is a prime.

It is a super-2 number, since 2×211211000120111² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211211000120119) 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, 708761745221 + ... + 708761745518.

It is an arithmetic number, because the mean of its divisors is an integer number (53157130902750).

Almost surely, 2^{211211000120111} is an apocalyptic number.

211211000120111 is a deficient number, since it is larger than the sum of its proper divisors (1417523490889).

211211000120111 is a wasteful number, since it uses less digits than its factorization.

211211000120111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1417523490888.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 211211000120111 its reverse (111021000112112), we get a palindrome (322232000232223).

The spelling of 211211000120111 in words is "two hundred eleven trillion, two hundred eleven billion, one hundred twenty thousand, one hundred eleven".