20112215151 has 32 divisors (see below), whose sum is σ = 32009822208. Its totient is φ = 10982648160.

The previous prime is 20112215147. The next prime is 20112215161. The reversal of 20112215151 is 15151221102.

It is not a de Polignac number, because 20112215151 - 2² = 20112215147 is a prime.

It is a super-2 number, since 2×20112215151² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20112215161) 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 31 ways as a sum of consecutive naturals, for example, 507870 + ... + 546036.

It is an arithmetic number, because the mean of its divisors is an integer number (1000306944).

Almost surely, 2^20112215151 is an apocalyptic number.

20112215151 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

20112215151 is a deficient number, since it is larger than the sum of its proper divisors (11897607057).

20112215151 is a wasteful number, since it uses less digits than its factorization.

20112215151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39291.

The product of its (nonzero) digits is 200, while the sum is 21.

Adding to 20112215151 its reverse (15151221102), we get a palindrome (35263436253).

The spelling of 20112215151 in words is "twenty billion, one hundred twelve million, two hundred fifteen thousand, one hundred fifty-one".