1000121202100 has 36 divisors (see below), whose sum is σ = 2170324402848. Its totient is φ = 400037164000.

The previous prime is 1000121202097. The next prime is 1000121202109. The reversal of 1000121202100 is 12021210001.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1000121202109) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4020345 + ... + 4261855.

It is an arithmetic number, because the mean of its divisors is an integer number (60286788968).

Almost surely, 2^{1000121202100} is an apocalyptic number.

1000121202100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1000121202100 is an abundant number, since it is smaller than the sum of its proper divisors (1170203200748).

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

1000121202100 is a wasteful number, since it uses less digits than its factorization.

1000121202100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 282936 (or 282929 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 1000121202100 its reverse (12021210001), we get a palindrome (1012142412101).

The spelling of 1000121202100 in words is "one trillion, one hundred twenty-one million, two hundred two thousand, one hundred".