121100121221010 has 32 divisors (see below), whose sum is σ = 292246038407232. Its totient is φ = 32114949272640.

The previous prime is 121100121221003. The next prime is 121100121221011. The reversal of 121100121221010 is 10122121001121.

It is a happy number.

It is a super-4 number, since 4×121100121221010⁴ (a number of 57 digits) contains 4444 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (121100121221011) 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, 11151018624 + ... + 11151029483.

It is an arithmetic number, because the mean of its divisors is an integer number (9132688700226).

Almost surely, 2^{121100121221010} is an apocalyptic number.

121100121221010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121100121221010 is an abundant number, since it is smaller than the sum of its proper divisors (171145917186222).

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

121100121221010 is a wasteful number, since it uses less digits than its factorization.

121100121221010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22302048298.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 121100121221010 its reverse (10122121001121), we get a palindrome (131222242222131).

The spelling of 121100121221010 in words is "one hundred twenty-one trillion, one hundred billion, one hundred twenty-one million, two hundred twenty-one thousand, ten".