121012220100210 has 16 divisors (see below), whose sum is σ = 290429328240576. Its totient is φ = 32269925360048.

The previous prime is 121012220100197. The next prime is 121012220100217. The reversal of 121012220100210 is 12001022210121.

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

It is a self number, because there is not a number n which added to its sum of digits gives 121012220100210.

It is not an unprimeable number, because it can be changed into a prime (121012220100217) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2016870334974 + ... + 2016870335033.

It is an arithmetic number, because the mean of its divisors is an integer number (18151833015036).

Almost surely, 2^{121012220100210} is an apocalyptic number.

121012220100210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121012220100210 is an abundant number, since it is smaller than the sum of its proper divisors (169417108140366).

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

121012220100210 is a wasteful number, since it uses less digits than its factorization.

121012220100210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4033740670017.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 121012220100210 its reverse (12001022210121), we get a palindrome (133013242310331).

The spelling of 121012220100210 in words is "one hundred twenty-one trillion, twelve billion, two hundred twenty million, one hundred thousand, two hundred ten".