211431402042 has 32 divisors (see below), whose sum is σ = 504283594752. Its totient is φ = 57782494704.

The previous prime is 211431402037. The next prime is 211431402073. The reversal of 211431402042 is 240204134112.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 109435578 + ... + 109437509.

It is an arithmetic number, because the mean of its divisors is an integer number (15758862336).

Almost surely, 2^211431402042 is an apocalyptic number.

211431402042 is an abundant number, since it is smaller than the sum of its proper divisors (292852192710).

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

211431402042 is a wasteful number, since it uses less digits than its factorization.

211431402042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218873122.

The product of its (nonzero) digits is 1536, while the sum is 24.

Adding to 211431402042 its reverse (240204134112), we get a palindrome (451635536154).

The spelling of 211431402042 in words is "two hundred eleven billion, four hundred thirty-one million, four hundred two thousand, forty-two".