211211211442 has 96 divisors (see below), whose sum is σ = 408247402752. Its totient is φ = 80173632000.

The previous prime is 211211211383. The next prime is 211211211457. The reversal of 211211211442 is 244112112112.

It is a super-2 number, since 2×211211211442² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 66188067 + ... + 66191257.

It is an arithmetic number, because the mean of its divisors is an integer number (4252577112).

Almost surely, 2^211211211442 is an apocalyptic number.

211211211442 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

211211211442 is a deficient number, since it is larger than the sum of its proper divisors (197036191310).

211211211442 is a wasteful number, since it uses less digits than its factorization.

211211211442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4216 (or 4205 counting only the distinct ones).

The product of its digits is 256, while the sum is 22.

Adding to 211211211442 its reverse (244112112112), we get a palindrome (455323323554).

The spelling of 211211211442 in words is "two hundred eleven billion, two hundred eleven million, two hundred eleven thousand, four hundred forty-two".