215031400013111 has 4 divisors (see below), whose sum is σ = 234579709105224. Its totient is φ = 195483090921000.

The previous prime is 215031400013093. The next prime is 215031400013141. The reversal of 215031400013111 is 111310004130512.

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 215031400013111 - 2⁶ = 215031400013047 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215031400013141) 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, 9774154546040 + ... + 9774154546061.

It is an arithmetic number, because the mean of its divisors is an integer number (58644927276306).

Almost surely, 2^{215031400013111} is an apocalyptic number.

215031400013111 is a deficient number, since it is larger than the sum of its proper divisors (19548309092113).

215031400013111 is a wasteful number, since it uses less digits than its factorization.

215031400013111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19548309092112.

The product of its (nonzero) digits is 360, while the sum is 23.

Adding to 215031400013111 its reverse (111310004130512), we get a palindrome (326341404143623).

The spelling of 215031400013111 in words is "two hundred fifteen trillion, thirty-one billion, four hundred million, thirteen thousand, one hundred eleven".