121423223120 has 20 divisors (see below), whose sum is σ = 282308993940. Its totient is φ = 48569289216.

The previous prime is 121423223099. The next prime is 121423223143. The reversal of 121423223120 is 21322324121.

It can be written as a sum of positive squares in 2 ways, for example, as 43009782544 + 78413440576 = 207388^2 + 280024^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-2 number, since 2×121423223120² (a number of 23 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 3 ways as a sum of consecutive naturals, for example, 758895065 + ... + 758895224.

It is an arithmetic number, because the mean of its divisors is an integer number (14115449697).

Almost surely, 2^121423223120 is an apocalyptic number.

121423223120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121423223120 is an abundant number, since it is smaller than the sum of its proper divisors (160885770820).

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

121423223120 is a wasteful number, since it uses less digits than its factorization.

121423223120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1517790302 (or 1517790296 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 121423223120 its reverse (21322324121), we get a palindrome (142745547241).

The spelling of 121423223120 in words is "one hundred twenty-one billion, four hundred twenty-three million, two hundred twenty-three thousand, one hundred twenty".