21101411 has 2 divisors, whose sum is σ = 21101412. Its totient is φ = 21101410.

The previous prime is 21101407. The next prime is 21101441. The reversal of 21101411 is 11410112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21101411 - 2² = 21101407 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21101392 and 21101401.

It is not a weakly prime, because it can be changed into another prime (21101401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10550705 + 10550706.

It is an arithmetic number, because the mean of its divisors is an integer number (10550706).

Almost surely, 2^21101411 is an apocalyptic number.

21101411 is a deficient number, since it is larger than the sum of its proper divisors (1).

21101411 is an equidigital number, since it uses as much as digits as its factorization.

21101411 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8, while the sum is 11.

The square root of 21101411 is about 4593.6272160462. The cubic root of 21101411 is about 276.3358082638.

Adding to 21101411 its reverse (11410112), we get a palindrome (32511523).

It can be divided in two parts, 21101 and 411, that added together give a palindrome (21512).

The spelling of 21101411 in words is "twenty-one million, one hundred one thousand, four hundred eleven".