123011403551022 has 128 divisors (see below), whose sum is σ = 305763508786176. Its totient is φ = 32183723354112.

The previous prime is 123011403551017. The next prime is 123011403551051. The reversal of 123011403551022 is 220155304110321.

It is a happy number.

It is a super-2 number, since 2×123011403551022² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1544805573 + ... + 1544885199.

It is an arithmetic number, because the mean of its divisors is an integer number (2388777412392).

Almost surely, 2^{123011403551022} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 123011403551022, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (152881754393088).

123011403551022 is an abundant number, since it is smaller than the sum of its proper divisors (182752105235154).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

123011403551022 is a wasteful number, since it uses less digits than its factorization.

123011403551022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138170.

The product of its (nonzero) digits is 7200, while the sum is 30.

Adding to 123011403551022 its reverse (220155304110321), we get a palindrome (343166707661343).

The spelling of 123011403551022 in words is "one hundred twenty-three trillion, eleven billion, four hundred three million, five hundred fifty-one thousand, twenty-two".