121210121231010 has 288 divisors, whose sum is σ = 391653069013440. Its totient is φ = 25855256173824.

The previous prime is 121210121230973. The next prime is 121210121231011. The reversal of 121210121231010 is 10132121012121.

It is a happy number.

121210121231010 is a `hidden beast` number, since 1 + 21 + 210 + 121 + 2 + 310 + 1 + 0 = 666.

121210121231010 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×121210121231010² (a number of 29 digits) contains 22 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (121210121231011) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 5181549 + ... + 16409408.

It is an arithmetic number, because the mean of its divisors is an integer number (1359906489630).

Almost surely, 2^{121210121231010} is an apocalyptic number.

121210121231010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121210121231010 is an abundant number, since it is smaller than the sum of its proper divisors (270442947782430).

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

121210121231010 is a wasteful number, since it uses less digits than its factorization.

121210121231010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21591070 (or 21591060 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 18.

Adding to 121210121231010 its reverse (10132121012121), we get a palindrome (131342242243131).

The spelling of 121210121231010 in words is "one hundred twenty-one trillion, two hundred ten billion, one hundred twenty-one million, two hundred thirty-one thousand, ten".