121021100030 has 16 divisors (see below), whose sum is σ = 217845910080. Its totient is φ = 48406677792.

The previous prime is 121021100009. The next prime is 121021100033. The reversal of 121021100030 is 30001120121.

It is a super-2 number, since 2×121021100030² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 121021099984 and 121021100020.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121021100033) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 88811 + ... + 499929.

It is an arithmetic number, because the mean of its divisors is an integer number (13615369380).

Almost surely, 2^121021100030 is an apocalyptic number.

121021100030 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121021100030 is a deficient number, since it is larger than the sum of its proper divisors (96824810050).

121021100030 is a wasteful number, since it uses less digits than its factorization.

121021100030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 440563.

The product of its (nonzero) digits is 12, while the sum is 11.

Adding to 121021100030 its reverse (30001120121), we get a palindrome (151022220151).

The spelling of 121021100030 in words is "one hundred twenty-one billion, twenty-one million, one hundred thousand, thirty".