213145401242 has 16 divisors (see below), whose sum is σ = 322314316800. Its totient is φ = 105707706048.

The previous prime is 213145401233. The next prime is 213145401251. The reversal of 213145401242 is 242104541312.

It is a happy number.

213145401242 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (213145401233) and next prime (213145401251).

It is a super-2 number, since 2×213145401242² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 960509 + ... + 1161407.

It is an arithmetic number, because the mean of its divisors is an integer number (20144644800).

Almost surely, 2^213145401242 is an apocalyptic number.

213145401242 is a deficient number, since it is larger than the sum of its proper divisors (109168915558).

213145401242 is a wasteful number, since it uses less digits than its factorization.

213145401242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205205.

The product of its (nonzero) digits is 7680, while the sum is 29.

Adding to 213145401242 its reverse (242104541312), we get a palindrome (455249942554).

The spelling of 213145401242 in words is "two hundred thirteen billion, one hundred forty-five million, four hundred one thousand, two hundred forty-two".