1201210012021 has 8 divisors (see below), whose sum is σ = 1204507106264. Its totient is φ = 1197913328640.

The previous prime is 1201210011959. The next prime is 1201210012033. The reversal of 1201210012021 is 1202100121021.

It can be written as a sum of positive squares in 4 ways, for example, as 21566391025 + 1179643620996 = 146855^2 + 1086114^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1201210012021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1201210011992 and 1201210012010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201210012061) 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, 6298141 + ... + 6486061.

It is an arithmetic number, because the mean of its divisors is an integer number (150563388283).

Almost surely, 2^{1201210012021} is an apocalyptic number.

It is an amenable number.

1201210012021 is a deficient number, since it is larger than the sum of its proper divisors (3297094243).

1201210012021 is a wasteful number, since it uses less digits than its factorization.

1201210012021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205431.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 1201210012021 its reverse (1202100121021), we get a palindrome (2403310133042).

The spelling of 1201210012021 in words is "one trillion, two hundred one billion, two hundred ten million, twelve thousand, twenty-one".