1230121101 has 16 divisors (see below), whose sum is σ = 1850967360. Its totient is φ = 719819520.

The previous prime is 1230121097. The next prime is 1230121103. The reversal of 1230121101 is 1011210321.

It is not a de Polignac number, because 1230121101 - 2² = 1230121097 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1230121103) 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, 641740 + ... + 643653.

It is an arithmetic number, because the mean of its divisors is an integer number (115685460).

Almost surely, 2^1230121101 is an apocalyptic number.

1230121101 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1230121101 is a deficient number, since it is larger than the sum of its proper divisors (620846259).

1230121101 is a wasteful number, since it uses less digits than its factorization.

1230121101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1285436.

The product of its (nonzero) digits is 12, while the sum is 12.

The square root of 1230121101 is about 35073.0822854222. The cubic root of 1230121101 is about 1071.4764318455.

Adding to 1230121101 its reverse (1011210321), we get a palindrome (2241331422).

The spelling of 1230121101 in words is "one billion, two hundred thirty million, one hundred twenty-one thousand, one hundred one".