12021400203515 has 8 divisors (see below), whose sum is σ = 14426547636768. Its totient is φ = 9616541901120.

The previous prime is 12021400203503. The next prime is 12021400203559. The reversal of 12021400203515 is 51530200412021.

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

It is not a de Polignac number, because 12021400203515 - 2³⁰ = 12020326461691 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 72191231 + ... + 72357560.

It is an arithmetic number, because the mean of its divisors is an integer number (1803318454596).

Almost surely, 2^{12021400203515} is an apocalyptic number.

12021400203515 is a deficient number, since it is larger than the sum of its proper divisors (2405147433253).

12021400203515 is a wasteful number, since it uses less digits than its factorization.

12021400203515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144565429.

The product of its (nonzero) digits is 2400, while the sum is 26.

Adding to 12021400203515 its reverse (51530200412021), we get a palindrome (63551600615536).

The spelling of 12021400203515 in words is "twelve trillion, twenty-one billion, four hundred million, two hundred three thousand, five hundred fifteen".