1212021120123 has 24 divisors (see below), whose sum is σ = 1928393725440. Its totient is φ = 727426614960.

The previous prime is 1212021120109. The next prime is 1212021120133. The reversal of 1212021120123 is 3210211202121.

It is not a de Polignac number, because 1212021120123 - 2⁹ = 1212021119611 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1212021120096 and 1212021120105.

It is not an unprimeable number, because it can be changed into a prime (1212021120103) 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, 59420083 + ... + 59440476.

It is an arithmetic number, because the mean of its divisors is an integer number (80349738560).

Almost surely, 2^{1212021120123} is an apocalyptic number.

1212021120123 is a deficient number, since it is larger than the sum of its proper divisors (716372605317).

1212021120123 is a wasteful number, since it uses less digits than its factorization.

1212021120123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118860679 (or 118860676 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 1212021120123 its reverse (3210211202121), we get a palindrome (4422232322244).

The spelling of 1212021120123 in words is "one trillion, two hundred twelve billion, twenty-one million, one hundred twenty thousand, one hundred twenty-three".