121000023231210 has 192 divisors, whose sum is σ = 336686126999040. Its totient is φ = 30075092213760.

The previous prime is 121000023231209. The next prime is 121000023231221. The reversal of 121000023231210 is 12132320000121.

121000023231210 is a `hidden beast` number, since 12 + 100 + 0 + 0 + 232 + 312 + 10 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 70356282 + ... + 72055578.

It is an arithmetic number, because the mean of its divisors is an integer number (1753573578120).

Almost surely, 2^{121000023231210} is an apocalyptic number.

121000023231210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 121000023231210, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (168343063499520).

121000023231210 is an abundant number, since it is smaller than the sum of its proper divisors (215686103767830).

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

121000023231210 is a wasteful number, since it uses less digits than its factorization.

121000023231210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1700213 (or 1700210 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 121000023231210 its reverse (12132320000121), we get a palindrome (133132343231331).

The spelling of 121000023231210 in words is "one hundred twenty-one trillion, twenty-three million, two hundred thirty-one thousand, two hundred ten".