21402432012112 has 10 divisors (see below), whose sum is σ = 41467212023498. Its totient is φ = 10701216006048.

The previous prime is 21402432012107. The next prime is 21402432012151. The reversal of 21402432012112 is 21121023420412.

It can be written as a sum of positive squares in only one way, i.e., 21402429628176 + 2383936 = 4626276^2 + 1544^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 668826000363 + ... + 668826000394.

Almost surely, 2^{21402432012112} is an apocalyptic number.

It is an amenable number.

21402432012112 is a deficient number, since it is larger than the sum of its proper divisors (20064780011386).

21402432012112 is a wasteful number, since it uses less digits than its factorization.

21402432012112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1337652000765 (or 1337652000759 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 25.

Adding to 21402432012112 its reverse (21121023420412), we get a palindrome (42523455432524).

The spelling of 21402432012112 in words is "twenty-one trillion, four hundred two billion, four hundred thirty-two million, twelve thousand, one hundred twelve".