121100210019 has 48 divisors (see below), whose sum is σ = 188866248480. Its totient is φ = 74613127680.

The previous prime is 121100210017. The next prime is 121100210053. The reversal of 121100210019 is 910012001121.

It is a happy number.

It is not a de Polignac number, because 121100210019 - 2¹ = 121100210017 is a prime.

It is a super-2 number, since 2×121100210019² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 121100209983 and 121100210010.

It is not an unprimeable number, because it can be changed into a prime (121100210017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 460392 + ... + 673914.

It is an arithmetic number, because the mean of its divisors is an integer number (3934713510).

Almost surely, 2^121100210019 is an apocalyptic number.

121100210019 is a deficient number, since it is larger than the sum of its proper divisors (67766038461).

121100210019 is a wasteful number, since it uses less digits than its factorization.

121100210019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213652 (or 213649 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 18.

The spelling of 121100210019 in words is "one hundred twenty-one billion, one hundred million, two hundred ten thousand, nineteen".