1200110023021 has 16 divisors (see below), whose sum is σ = 1485903170304. Its totient is φ = 943851734784.

The previous prime is 1200110022997. The next prime is 1200110023031. The reversal of 1200110023021 is 1203200110021.

It is not a de Polignac number, because 1200110023021 - 2³⁵ = 1165750284653 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a junction number, because it is equal to n+sod(n) for n = 1200110022992 and 1200110023010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200110023031) 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, 39469900 + ... + 39500293.

It is an arithmetic number, because the mean of its divisors is an integer number (92868948144).

Almost surely, 2^{1200110023021} is an apocalyptic number.

It is an amenable number.

1200110023021 is a deficient number, since it is larger than the sum of its proper divisors (285793147283).

1200110023021 is a wasteful number, since it uses less digits than its factorization.

1200110023021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78970380.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 1200110023021 its reverse (1203200110021), we get a palindrome (2403310133042).

The spelling of 1200110023021 in words is "one trillion, two hundred billion, one hundred ten million, twenty-three thousand, twenty-one".