211421211442 has 16 divisors (see below), whose sum is σ = 362717134272. Its totient is φ = 90538897680.

The previous prime is 211421211431. The next prime is 211421211451. The reversal of 211421211442 is 244112124112.

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, 5830693 + ... + 5866840.

It is an arithmetic number, because the mean of its divisors is an integer number (22669820892).

Almost surely, 2^211421211442 is an apocalyptic number.

211421211442 is a deficient number, since it is larger than the sum of its proper divisors (151295922830).

211421211442 is a wasteful number, since it uses less digits than its factorization.

211421211442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11698833.

The product of its digits is 1024, while the sum is 25.

Adding to 211421211442 its reverse (244112124112), we get a palindrome (455533335554).

The spelling of 211421211442 in words is "two hundred eleven billion, four hundred twenty-one million, two hundred eleven thousand, four hundred forty-two".