21150011411156 has 24 divisors (see below), whose sum is σ = 39866606582880. Its totient is φ = 9785439794592.

The previous prime is 21150011411119. The next prime is 21150011411159. The reversal of 21150011411156 is 65111411005112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21150011411159) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3235922591 + ... + 3235929126.

It is an arithmetic number, because the mean of its divisors is an integer number (1661108607620).

Almost surely, 2^{21150011411156} is an apocalyptic number.

It is an amenable number.

21150011411156 is a deficient number, since it is larger than the sum of its proper divisors (18716595171724).

21150011411156 is a wasteful number, since it uses less digits than its factorization.

21150011411156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6471851783 (or 6471851781 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 29.

Adding to 21150011411156 its reverse (65111411005112), we get a palindrome (86261422416268).

The spelling of 21150011411156 in words is "twenty-one trillion, one hundred fifty billion, eleven million, four hundred eleven thousand, one hundred fifty-six".