211421212242 has 16 divisors (see below), whose sum is σ = 422876819232. Its totient is φ = 70468004960.

The previous prime is 211421212217. The next prime is 211421212267. The reversal of 211421212242 is 242212124112.

It is an interprime number because it is at equal distance from previous prime (211421212217) and next prime (211421212267).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1352859 + ... + 1501022.

It is an arithmetic number, because the mean of its divisors is an integer number (26429801202).

Almost surely, 2^211421212242 is an apocalyptic number.

211421212242 is an abundant number, since it is smaller than the sum of its proper divisors (211455606990).

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

211421212242 is a wasteful number, since it uses less digits than its factorization.

211421212242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2866233.

The product of its digits is 1024, while the sum is 24.

Adding to 211421212242 its reverse (242212124112), we get a palindrome (453633336354).

The spelling of 211421212242 in words is "two hundred eleven billion, four hundred twenty-one million, two hundred twelve thousand, two hundred forty-two".