215001026120 has 64 divisors (see below), whose sum is σ = 511092460800. Its totient is φ = 81173352960.

The previous prime is 215001026089. The next prime is 215001026137. The reversal of 215001026120 is 21620100512.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 215001026092 and 215001026101.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 315989 + ... + 727908.

It is an arithmetic number, because the mean of its divisors is an integer number (7985819700).

Almost surely, 2^215001026120 is an apocalyptic number.

215001026120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

215001026120 is an abundant number, since it is smaller than the sum of its proper divisors (296091434680).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

215001026120 is a wasteful number, since it uses less digits than its factorization.

215001026120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1044198 (or 1044194 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 20.

Adding to 215001026120 its reverse (21620100512), we get a palindrome (236621126632).

The spelling of 215001026120 in words is "two hundred fifteen billion, one million, twenty-six thousand, one hundred twenty".