21402051014012 has 12 divisors (see below), whose sum is σ = 37453666324200. Its totient is φ = 10701003492816.

The previous prime is 21402051013943. The next prime is 21402051014023. The reversal of 21402051014012 is 21041015020412.

It is a super-2 number, since 2×21402051014012² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3209903 + ... + 7287494.

It is an arithmetic number, because the mean of its divisors is an integer number (3121138860350).

Almost surely, 2^{21402051014012} is an apocalyptic number.

It is an amenable number.

21402051014012 is a deficient number, since it is larger than the sum of its proper divisors (16051615310188).

21402051014012 is a wasteful number, since it uses less digits than its factorization.

21402051014012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11007100 (or 11007098 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 23.

Adding to 21402051014012 its reverse (21041015020412), we get a palindrome (42443066034424).

The spelling of 21402051014012 in words is "twenty-one trillion, four hundred two billion, fifty-one million, fourteen thousand, twelve".