211220321242 has 32 divisors (see below), whose sum is σ = 375731288064. Its totient is φ = 87172470000.

The previous prime is 211220321233. The next prime is 211220321251. The reversal of 211220321242 is 242123022112.

It is an interprime number because it is at equal distance from previous prime (211220321233) and next prime (211220321251).

It is a super-2 number, since 2×211220321242² (a number of 23 digits) contains 22 as substring.

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, 2428134 + ... + 2513617.

It is an arithmetic number, because the mean of its divisors is an integer number (11741602752).

Almost surely, 2^211220321242 is an apocalyptic number.

211220321242 is a deficient number, since it is larger than the sum of its proper divisors (164510966822).

211220321242 is a wasteful number, since it uses less digits than its factorization.

211220321242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4941874.

The product of its (nonzero) digits is 768, while the sum is 22.

Adding to 211220321242 its reverse (242123022112), we get a palindrome (453343343354).

The spelling of 211220321242 in words is "two hundred eleven billion, two hundred twenty million, three hundred twenty-one thousand, two hundred forty-two".