211420220242 has 32 divisors (see below), whose sum is σ = 395627950080. Its totient is φ = 82320539280.

The previous prime is 211420220237. The next prime is 211420220269. The reversal of 211420220242 is 242022024112.

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 15 ways as a sum of consecutive naturals, for example, 174658 + ... + 673309.

It is an arithmetic number, because the mean of its divisors is an integer number (12363373440).

Almost surely, 2^211420220242 is an apocalyptic number.

211420220242 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

211420220242 is a deficient number, since it is larger than the sum of its proper divisors (184207729838).

211420220242 is a wasteful number, since it uses less digits than its factorization.

211420220242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 849606.

The product of its (nonzero) digits is 1024, while the sum is 22.

Adding to 211420220242 its reverse (242022024112), we get a palindrome (453442244354).

The spelling of 211420220242 in words is "two hundred eleven billion, four hundred twenty million, two hundred twenty thousand, two hundred forty-two".