211621031402 has 16 divisors (see below), whose sum is σ = 346304827872. Its totient is φ = 96186970320.

The previous prime is 211621031393. The next prime is 211621031441. The reversal of 211621031402 is 204130126112.

211621031402 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 297728 + ... + 715460.

It is an arithmetic number, because the mean of its divisors is an integer number (21644051742).

Almost surely, 2^211621031402 is an apocalyptic number.

211621031402 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

211621031402 is a deficient number, since it is larger than the sum of its proper divisors (134683796470).

211621031402 is a wasteful number, since it uses less digits than its factorization.

211621031402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 440773.

The product of its (nonzero) digits is 576, while the sum is 23.

Adding to 211621031402 its reverse (204130126112), we get a palindrome (415751157514).

The spelling of 211621031402 in words is "two hundred eleven billion, six hundred twenty-one million, thirty-one thousand, four hundred two".