211421420342 has 16 divisors (see below), whose sum is σ = 345981149712. Its totient is φ = 96095416320.

The previous prime is 211421420339. The next prime is 211421420411. The reversal of 211421420342 is 243024124112.

It is a congruent number.

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, 167678 + ... + 671534.

It is an arithmetic number, because the mean of its divisors is an integer number (21623821857).

Almost surely, 2^211421420342 is an apocalyptic number.

211421420342 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

211421420342 is a deficient number, since it is larger than the sum of its proper divisors (134559729370).

211421420342 is a wasteful number, since it uses less digits than its factorization.

211421420342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 522943.

The product of its (nonzero) digits is 3072, while the sum is 26.

Adding to 211421420342 its reverse (243024124112), we get a palindrome (454445544454).

The spelling of 211421420342 in words is "two hundred eleven billion, four hundred twenty-one million, four hundred twenty thousand, three hundred forty-two".