211204120431 has 16 divisors (see below), whose sum is σ = 285024749184. Its totient is φ = 139093434144.

The previous prime is 211204120399. The next prime is 211204120453. The reversal of 211204120431 is 134021402112.

It is not a de Polignac number, because 211204120431 - 2⁵ = 211204120399 is a prime.

It is a super-2 number, since 2×211204120431² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 211204120398 and 211204120407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211204120031) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3180985 + ... + 3246701.

It is an arithmetic number, because the mean of its divisors is an integer number (17814046824).

Almost surely, 2^211204120431 is an apocalyptic number.

211204120431 is a deficient number, since it is larger than the sum of its proper divisors (73820628753).

211204120431 is a wasteful number, since it uses less digits than its factorization.

211204120431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78710.

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 211204120431 its reverse (134021402112), we get a palindrome (345225522543).

The spelling of 211204120431 in words is "two hundred eleven billion, two hundred four million, one hundred twenty thousand, four hundred thirty-one".