121022100123 has 16 divisors (see below), whose sum is σ = 169914201600. Its totient is φ = 76408630560.

The previous prime is 121022100109. The next prime is 121022100131. The reversal of 121022100123 is 321001220121.

It is not a de Polignac number, because 121022100123 - 2²² = 121017905819 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121022100193) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 199123 + ... + 530748.

It is an arithmetic number, because the mean of its divisors is an integer number (10619637600).

Almost surely, 2^121022100123 is an apocalyptic number.

121022100123 is a deficient number, since it is larger than the sum of its proper divisors (48892101477).

121022100123 is a wasteful number, since it uses less digits than its factorization.

121022100123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 732802.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 121022100123 its reverse (321001220121), we get a palindrome (442023320244).

The spelling of 121022100123 in words is "one hundred twenty-one billion, twenty-two million, one hundred thousand, one hundred twenty-three".