21402111410 has 16 divisors (see below), whose sum is σ = 40789906776. Its totient is φ = 8057265408.

The previous prime is 21402111377. The next prime is 21402111439. The reversal of 21402111410 is 1411120412.

It can be written as a sum of positive squares in 4 ways, for example, as 21401056681 + 1054729 = 146291^2 + 1027^2 .

It is a Harshad number since it is a multiple of its sum of digits (17).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 62947217 + ... + 62947556.

Almost surely, 2^21402111410 is an apocalyptic number.

21402111410 is a deficient number, since it is larger than the sum of its proper divisors (19387795366).

21402111410 is a wasteful number, since it uses less digits than its factorization.

21402111410 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125894797.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 21402111410 its reverse (1411120412), we get a palindrome (22813231822).

The spelling of 21402111410 in words is "twenty-one billion, four hundred two million, one hundred eleven thousand, four hundred ten".