211131430402 has 16 divisors (see below), whose sum is σ = 338646458232. Its totient is φ = 98372243200.

The previous prime is 211131430373. The next prime is 211131430409. The reversal of 211131430402 is 204034131112.

It can be written as a sum of positive squares in 4 ways, for example, as 209023610481 + 2107819921 = 457191^2 + 45911^2 .

It is not an unprimeable number, because it can be changed into a prime (211131430409) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30737893 + ... + 30744760.

Almost surely, 2^211131430402 is an apocalyptic number.

211131430402 is a deficient number, since it is larger than the sum of its proper divisors (127515027830).

211131430402 is a wasteful number, since it uses less digits than its factorization.

211131430402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61482773.

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 211131430402 its reverse (204034131112), we get a palindrome (415165561514).

The spelling of 211131430402 in words is "two hundred eleven billion, one hundred thirty-one million, four hundred thirty thousand, four hundred two".