21400142102 has 16 divisors (see below), whose sum is σ = 32630119872. Its totient is φ = 10523933640.

The previous prime is 21400142087. The next prime is 21400142119. The reversal of 21400142102 is 20124100412.

It is a congruent number.

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, 38024 + ... + 210347.

It is an arithmetic number, because the mean of its divisors is an integer number (2039382492).

Almost surely, 2^21400142102 is an apocalyptic number.

21400142102 is a deficient number, since it is larger than the sum of its proper divisors (11229977770).

21400142102 is a wasteful number, since it uses less digits than its factorization.

21400142102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249083.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 21400142102 its reverse (20124100412), we get a palindrome (41524242514).

The spelling of 21400142102 in words is "twenty-one billion, four hundred million, one hundred forty-two thousand, one hundred two".