1200122010021 has 64 divisors (see below), whose sum is σ = 1826777235456. Its totient is φ = 693721828800.

The previous prime is 1200122010007. The next prime is 1200122010029. The reversal of 1200122010021 is 1200102210021.

It is not a de Polignac number, because 1200122010021 - 2⁹ = 1200122009509 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1200122009979 and 1200122010006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200122010029) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 575045440 + ... + 575047526.

It is an arithmetic number, because the mean of its divisors is an integer number (28543394304).

Almost surely, 2^{1200122010021} is an apocalyptic number.

1200122010021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1200122010021 is a deficient number, since it is larger than the sum of its proper divisors (626655225435).

1200122010021 is a wasteful number, since it uses less digits than its factorization.

1200122010021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3942.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 1200122010021 its reverse (1200102210021), we get a palindrome (2400224220042).

It can be divided in two parts, 12001 and 22010021, that added together give a palindrome (22022022).

The spelling of 1200122010021 in words is "one trillion, two hundred billion, one hundred twenty-two million, ten thousand, twenty-one".