21213011102654 has 16 divisors (see below), whose sum is σ = 36365284520928. Its totient is φ = 9091259814912.

The previous prime is 21213011102629. The next prime is 21213011102663. The reversal of 21213011102654 is 45620111031212.

It is a happy number.

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, 2028602 + ... + 6822114.

It is an arithmetic number, because the mean of its divisors is an integer number (2272830282558).

Almost surely, 2^{21213011102654} is an apocalyptic number.

21213011102654 is a deficient number, since it is larger than the sum of its proper divisors (15152273418274).

21213011102654 is a wasteful number, since it uses less digits than its factorization.

21213011102654 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5109619.

The product of its (nonzero) digits is 2880, while the sum is 29.

Adding to 21213011102654 its reverse (45620111031212), we get a palindrome (66833122133866).

The spelling of 21213011102654 in words is "twenty-one trillion, two hundred thirteen billion, eleven million, one hundred two thousand, six hundred fifty-four".