21211141402 has 16 divisors (see below), whose sum is σ = 34716569472. Its totient is φ = 9639364320.

The previous prime is 21211141387. The next prime is 21211141403. The reversal of 21211141402 is 20414111212.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 21211141402.

It is not an unprimeable number, because it can be changed into a prime (21211141403) 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, 4438 + ... + 206014.

It is an arithmetic number, because the mean of its divisors is an integer number (2169785592).

Almost surely, 2^21211141402 is an apocalyptic number.

21211141402 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21211141402 is a deficient number, since it is larger than the sum of its proper divisors (13505428070).

21211141402 is a wasteful number, since it uses less digits than its factorization.

21211141402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206373.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 21211141402 its reverse (20414111212), we get a palindrome (41625252614).

The spelling of 21211141402 in words is "twenty-one billion, two hundred eleven million, one hundred forty-one thousand, four hundred two".