1201122020021 has 8 divisors (see below), whose sum is σ = 1497502778304. Its totient is φ = 935939236320.

The previous prime is 1201122020017. The next prime is 1201122020053. The reversal of 1201122020021 is 1200202211021.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1201122020021 - 2² = 1201122020017 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1201122019978 and 1201122020005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201122020011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7799493560 + ... + 7799493713.

It is an arithmetic number, because the mean of its divisors is an integer number (187187847288).

Almost surely, 2^{1201122020021} is an apocalyptic number.

1201122020021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1201122020021 is a deficient number, since it is larger than the sum of its proper divisors (296380758283).

1201122020021 is a wasteful number, since it uses less digits than its factorization.

1201122020021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15598987291.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 1201122020021 its reverse (1200202211021), we get a palindrome (2401324231042).

The spelling of 1201122020021 in words is "one trillion, two hundred one billion, one hundred twenty-two million, twenty thousand, twenty-one".