1213404245511 has 16 divisors (see below), whose sum is σ = 1646713433088. Its totient is φ = 794599696800.

The previous prime is 1213404245447. The next prime is 1213404245513. The reversal of 1213404245511 is 1155424043121.

It is not a de Polignac number, because 1213404245511 - 2⁶ = 1213404245447 is a prime.

It is a super-2 number, since 2×1213404245511² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213404245513) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10452856 + ... + 10568301.

It is an arithmetic number, because the mean of its divisors is an integer number (102919589568).

Almost surely, 2^{1213404245511} is an apocalyptic number.

1213404245511 is a deficient number, since it is larger than the sum of its proper divisors (433309187577).

1213404245511 is a wasteful number, since it uses less digits than its factorization.

1213404245511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21021502.

The product of its (nonzero) digits is 19200, while the sum is 33.

Adding to 1213404245511 its reverse (1155424043121), we get a palindrome (2368828288632).

The spelling of 1213404245511 in words is "one trillion, two hundred thirteen billion, four hundred four million, two hundred forty-five thousand, five hundred eleven".