100121221002 has 32 divisors (see below), whose sum is σ = 224350259904. Its totient is φ = 29519769600.

The previous prime is 100121220989. The next prime is 100121221003. The reversal of 100121221002 is 200122121001.

It is not an unprimeable number, because it can be changed into a prime (100121221003) 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, 20497399 + ... + 20502282.

It is an arithmetic number, because the mean of its divisors is an integer number (7010945622).

Almost surely, 2^100121221002 is an apocalyptic number.

100121221002 is an abundant number, since it is smaller than the sum of its proper divisors (124229038902).

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

100121221002 is a wasteful number, since it uses less digits than its factorization.

100121221002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40999734.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 100121221002 its reverse (200122121001), we get a palindrome (300243342003).

It can be divided in two parts, 100121 and 221002, that added together give a palindrome (321123).

The spelling of 100121221002 in words is "one hundred billion, one hundred twenty-one million, two hundred twenty-one thousand, two".