40021102151215 has 4 divisors (see below), whose sum is σ = 48025322581464. Its totient is φ = 32016881720968.

The previous prime is 40021102151213. The next prime is 40021102151297. The reversal of 40021102151215 is 51215120112004.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 40021102151215 - 2¹ = 40021102151213 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 40021102151215.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40021102151213) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4002110215117 + ... + 4002110215126.

It is an arithmetic number, because the mean of its divisors is an integer number (12006330645366).

Almost surely, 2^{40021102151215} is an apocalyptic number.

40021102151215 is a deficient number, since it is larger than the sum of its proper divisors (8004220430249).

40021102151215 is an equidigital number, since it uses as much as digits as its factorization.

40021102151215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8004220430248.

The product of its (nonzero) digits is 800, while the sum is 25.

Adding to 40021102151215 its reverse (51215120112004), we get a palindrome (91236222263219).

The spelling of 40021102151215 in words is "forty trillion, twenty-one billion, one hundred two million, one hundred fifty-one thousand, two hundred fifteen".