1012212120123 has 24 divisors (see below), whose sum is σ = 1548241220448. Its totient is φ = 635051089152.

The previous prime is 1012212120091. The next prime is 1012212120163. The reversal of 1012212120123 is 3210212122101.

It is not a de Polignac number, because 1012212120123 - 2⁵ = 1012212120091 is a prime.

It is a super-2 number, since 2×1012212120123² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1012212120096 and 1012212120105.

It is not an unprimeable number, because it can be changed into a prime (1012212120163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1262661 + ... + 1902297.

It is an arithmetic number, because the mean of its divisors is an integer number (64510050852).

Almost surely, 2^{1012212120123} is an apocalyptic number.

1012212120123 is a deficient number, since it is larger than the sum of its proper divisors (536029100325).

1012212120123 is a wasteful number, since it uses less digits than its factorization.

1012212120123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 650003 (or 650000 counting only the distinct ones).

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

Adding to 1012212120123 its reverse (3210212122101), we get a palindrome (4222424242224).

The spelling of 1012212120123 in words is "one trillion, twelve billion, two hundred twelve million, one hundred twenty thousand, one hundred twenty-three".