55123221411 has 16 divisors (see below), whose sum is σ = 81807073920. Its totient is φ = 36684445320.

The previous prime is 55123221407. The next prime is 55123221427. The reversal of 55123221411 is 11412232155.

It is a happy number.

55123221411 is a `hidden beast` number, since 5 + 5 + 1 + 23 + 221 + 411 = 666.

It is not a de Polignac number, because 55123221411 - 2² = 55123221407 is a prime.

It is a super-2 number, since 2×55123221411² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (55123221481) 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, 1772325 + ... + 1803158.

It is an arithmetic number, because the mean of its divisors is an integer number (5112942120).

Almost surely, 2^55123221411 is an apocalyptic number.

55123221411 is a deficient number, since it is larger than the sum of its proper divisors (26683852509).

55123221411 is a wasteful number, since it uses less digits than its factorization.

55123221411 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3576063 (or 3576057 counting only the distinct ones).

The product of its digits is 2400, while the sum is 27.

Adding to 55123221411 its reverse (11412232155), we get a palindrome (66535453566).

The spelling of 55123221411 in words is "fifty-five billion, one hundred twenty-three million, two hundred twenty-one thousand, four hundred eleven".