211111322142 has 64 divisors (see below), whose sum is σ = 508154918400. Its totient is φ = 57118400640.

The previous prime is 211111322141. The next prime is 211111322183. The reversal of 211111322142 is 241223111112.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211111322141) 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, 1844484 + ... + 1955592.

It is an arithmetic number, because the mean of its divisors is an integer number (7939920600).

Almost surely, 2^211111322142 is an apocalyptic number.

211111322142 is an abundant number, since it is smaller than the sum of its proper divisors (297043596258).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

211111322142 is a wasteful number, since it uses less digits than its factorization.

211111322142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113521.

The product of its digits is 192, while the sum is 21.

Adding to 211111322142 its reverse (241223111112), we get a palindrome (452334433254).

The spelling of 211111322142 in words is "two hundred eleven billion, one hundred eleven million, three hundred twenty-two thousand, one hundred forty-two".