21150215401052 has 24 divisors (see below), whose sum is σ = 37119673221120. Its totient is φ = 10544600349360.

The previous prime is 21150215401033. The next prime is 21150215401067. The reversal of 21150215401052 is 25010451205112.

It is a super-2 number, since 2×21150215401052² (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 7 ways as a sum of consecutive naturals, for example, 13791053 + ... + 15247739.

It is an arithmetic number, because the mean of its divisors is an integer number (1546653050880).

Almost surely, 2^{21150215401052} is an apocalyptic number.

It is an amenable number.

21150215401052 is a deficient number, since it is larger than the sum of its proper divisors (15969457820068).

21150215401052 is a wasteful number, since it uses less digits than its factorization.

21150215401052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1467161 (or 1467159 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 29.

Adding to 21150215401052 its reverse (25010451205112), we get a palindrome (46160666606164).

The spelling of 21150215401052 in words is "twenty-one trillion, one hundred fifty billion, two hundred fifteen million, four hundred one thousand, fifty-two".