21887211401 has 16 divisors (see below), whose sum is σ = 24948217728. Its totient is φ = 19007049600.

The previous prime is 21887211371. The next prime is 21887211407. The reversal of 21887211401 is 10411278812.

It is not a de Polignac number, because 21887211401 - 2¹⁰ = 21887210377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21887211407) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 134381 + ... + 248661.

It is an arithmetic number, because the mean of its divisors is an integer number (1559263608).

Almost surely, 2^21887211401 is an apocalyptic number.

It is an amenable number.

21887211401 is a deficient number, since it is larger than the sum of its proper divisors (3061006327).

21887211401 is a wasteful number, since it uses less digits than its factorization.

21887211401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115072.

The product of its (nonzero) digits is 7168, while the sum is 35.

The spelling of 21887211401 in words is "twenty-one billion, eight hundred eighty-seven million, two hundred eleven thousand, four hundred one".