211541421018 has 16 divisors (see below), whose sum is σ = 423226149696. Its totient is φ = 70489922400.

The previous prime is 211541420999. The next prime is 211541421023. The reversal of 211541421018 is 810124145112.

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, 5951958 + ... + 5987393.

It is an arithmetic number, because the mean of its divisors is an integer number (26451634356).

Almost surely, 2^211541421018 is an apocalyptic number.

211541421018 is an abundant number, since it is smaller than the sum of its proper divisors (211684728678).

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

211541421018 is a wasteful number, since it uses less digits than its factorization.

211541421018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11942309.

The product of its (nonzero) digits is 2560, while the sum is 30.

The spelling of 211541421018 in words is "two hundred eleven billion, five hundred forty-one million, four hundred twenty-one thousand, eighteen".