121021130045100 has 72 divisors (see below), whose sum is σ = 350155604943760. Its totient is φ = 32272196705280.

The previous prime is 121021130045083. The next prime is 121021130045107. The reversal of 121021130045100 is 1540031120121.

It is a super-2 number, since 2×121021130045100² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (121021130045107) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 149016936 + ... + 149826864.

Almost surely, 2^{121021130045100} is an apocalyptic number.

121021130045100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121021130045100 is an abundant number, since it is smaller than the sum of its proper divisors (229134474898660).

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

121021130045100 is a wasteful number, since it uses less digits than its factorization.

121021130045100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1308019 (or 1308012 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 21.

Adding to 121021130045100 its reverse (1540031120121), we get a palindrome (122561161165221).

The spelling of 121021130045100 in words is "one hundred twenty-one trillion, twenty-one billion, one hundred thirty million, forty-five thousand, one hundred".