211233402402 has 64 divisors (see below), whose sum is σ = 482553179136. Its totient is φ = 61017978560.

The previous prime is 211233402389. The next prime is 211233402409. The reversal of 211233402402 is 204204332112.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (211233402409) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 207313 + ... + 682235.

It is an arithmetic number, because the mean of its divisors is an integer number (7539893424).

Almost surely, 2^211233402402 is an apocalyptic number.

211233402402 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 211233402402, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (241276589568).

211233402402 is an abundant number, since it is smaller than the sum of its proper divisors (271319776734).

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

211233402402 is a wasteful number, since it uses less digits than its factorization.

211233402402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 475255.

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 211233402402 its reverse (204204332112), we get a palindrome (415437734514).

The spelling of 211233402402 in words is "two hundred eleven billion, two hundred thirty-three million, four hundred two thousand, four hundred two".