121212100230 has 64 divisors (see below), whose sum is σ = 314771643648. Its totient is φ = 29695397760.

The previous prime is 121212100201. The next prime is 121212100259. The reversal of 121212100230 is 32001212121.

It is an interprime number because it is at equal distance from previous prime (121212100201) and next prime (121212100259).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 654204 + ... + 818783.

It is an arithmetic number, because the mean of its divisors is an integer number (4918306932).

Almost surely, 2^121212100230 is an apocalyptic number.

121212100230 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121212100230 is an abundant number, since it is smaller than the sum of its proper divisors (193559543418).

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

121212100230 is a wasteful number, since it uses less digits than its factorization.

121212100230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1473221.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 121212100230 its reverse (32001212121), we get a palindrome (153213312351).

The spelling of 121212100230 in words is "one hundred twenty-one billion, two hundred twelve million, one hundred thousand, two hundred thirty".