1021121310123 has 96 divisors (see below), whose sum is σ = 1668618372096. Its totient is φ = 598341832704.

The previous prime is 1021121310101. The next prime is 1021121310137. The reversal of 1021121310123 is 3210131211201.

1021121310123 is a `hidden beast` number, since 1 + 0 + 211 + 21 + 310 + 123 = 666.

It is not a de Polignac number, because 1021121310123 - 2⁶ = 1021121310059 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1021121310096 and 1021121310105.

It is not an unprimeable number, because it can be changed into a prime (1021121310173) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 26623186 + ... + 26661512.

It is an arithmetic number, because the mean of its divisors is an integer number (17381441376).

Almost surely, 2^{1021121310123} is an apocalyptic number.

1021121310123 is a deficient number, since it is larger than the sum of its proper divisors (647497061973).

1021121310123 is a wasteful number, since it uses less digits than its factorization.

1021121310123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38553 (or 38550 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 1021121310123 its reverse (3210131211201), we get a palindrome (4231252521324).

The spelling of 1021121310123 in words is "one trillion, twenty-one billion, one hundred twenty-one million, three hundred ten thousand, one hundred twenty-three".