21151031041 has 8 divisors (see below), whose sum is σ = 24175156544. Its totient is φ = 18127542960.

The previous prime is 21151030997. The next prime is 21151031053. The reversal of 21151031041 is 14013015112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21151031041 - 2¹¹ = 21151028993 is a prime.

It is a super-2 number, since 2×21151031041² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21151031141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 85995 + ... + 222928.

It is an arithmetic number, because the mean of its divisors is an integer number (3021894568).

Almost surely, 2^21151031041 is an apocalyptic number.

It is an amenable number.

21151031041 is a deficient number, since it is larger than the sum of its proper divisors (3024125503).

21151031041 is an equidigital number, since it uses as much as digits as its factorization.

21151031041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 318711.

The product of its (nonzero) digits is 120, while the sum is 19.

Adding to 21151031041 its reverse (14013015112), we get a palindrome (35164046153).

The spelling of 21151031041 in words is "twenty-one billion, one hundred fifty-one million, thirty-one thousand, forty-one".