211525402011 has 48 divisors (see below), whose sum is σ = 361449589248. Its totient is φ = 108795288000.

The previous prime is 211525401979. The next prime is 211525402057. The reversal of 211525402011 is 110204525112.

It is a happy number.

It is not a de Polignac number, because 211525402011 - 2⁵ = 211525401979 is a prime.

It is not an unprimeable number, because it can be changed into a prime (211525402061) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 484275 + ... + 810908.

It is an arithmetic number, because the mean of its divisors is an integer number (7530199776).

Almost surely, 2^211525402011 is an apocalyptic number.

211525402011 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

211525402011 is a deficient number, since it is larger than the sum of its proper divisors (149924187237).

211525402011 is a wasteful number, since it uses less digits than its factorization.

211525402011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1295312 (or 1295305 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 24.

Adding to 211525402011 its reverse (110204525112), we get a palindrome (321729927123).

The spelling of 211525402011 in words is "two hundred eleven billion, five hundred twenty-five million, four hundred two thousand, eleven".