121301220100 has 36 divisors (see below), whose sum is σ = 263296147968. Its totient is φ = 48507124000.

The previous prime is 121301220091. The next prime is 121301220109. The reversal of 121301220100 is 1022103121.

It is an interprime number because it is at equal distance from previous prime (121301220091) and next prime (121301220109).

It is not an unprimeable number, because it can be changed into a prime (121301220109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 201885 + ... + 532315.

It is an arithmetic number, because the mean of its divisors is an integer number (7313781888).

Almost surely, 2^121301220100 is an apocalyptic number.

121301220100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121301220100 is an abundant number, since it is smaller than the sum of its proper divisors (141994927868).

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

121301220100 is a wasteful number, since it uses less digits than its factorization.

121301220100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334116 (or 334109 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 121301220100 its reverse (1022103121), we get a palindrome (122323323221).

The spelling of 121301220100 in words is "one hundred twenty-one billion, three hundred one million, two hundred twenty thousand, one hundred".