1012020153123 has 16 divisors (see below), whose sum is σ = 1543161674240. Its totient is φ = 577908832896.

The previous prime is 1012020153113. The next prime is 1012020153127. The reversal of 1012020153123 is 3213510202101.

It is not a de Polignac number, because 1012020153123 - 2¹² = 1012020149027 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1012020153123.

It is not an unprimeable number, because it can be changed into a prime (1012020153127) 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, 16151215 + ... + 16213752.

It is an arithmetic number, because the mean of its divisors is an integer number (96447604640).

Almost surely, 2^{1012020153123} is an apocalyptic number.

1012020153123 is a deficient number, since it is larger than the sum of its proper divisors (531141521117).

1012020153123 is a wasteful number, since it uses less digits than its factorization.

1012020153123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32366466.

The product of its (nonzero) digits is 360, while the sum is 21.

Adding to 1012020153123 its reverse (3213510202101), we get a palindrome (4225530355224).

The spelling of 1012020153123 in words is "one trillion, twelve billion, twenty million, one hundred fifty-three thousand, one hundred twenty-three".