211421400544 has 24 divisors (see below), whose sum is σ = 416323099080. Its totient is φ = 105688550016.

The previous prime is 211421400529. The next prime is 211421400581. The reversal of 211421400544 is 445004124112.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 536554 + ... + 843049.

It is an arithmetic number, because the mean of its divisors is an integer number (17346795795).

Almost surely, 2^211421400544 is an apocalyptic number.

It is an amenable number.

211421400544 is a deficient number, since it is larger than the sum of its proper divisors (204901698536).

211421400544 is a wasteful number, since it uses less digits than its factorization.

211421400544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1384402 (or 1384394 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 28.

Adding to 211421400544 its reverse (445004124112), we get a palindrome (656425524656).

The spelling of 211421400544 in words is "two hundred eleven billion, four hundred twenty-one million, four hundred thousand, five hundred forty-four".