1201210122021 has 128 divisors (see below), whose sum is σ = 2047439708160. Its totient is φ = 609531153408.

The previous prime is 1201210121983. The next prime is 1201210122043. The reversal of 1201210122021 is 1202210121021.

It is not a de Polignac number, because 1201210122021 - 2⁷ = 1201210121893 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201210122521) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 369260631 + ... + 369263883.

It is an arithmetic number, because the mean of its divisors is an integer number (15995622720).

Almost surely, 2^{1201210122021} is an apocalyptic number.

It is an amenable number.

1201210122021 is a deficient number, since it is larger than the sum of its proper divisors (846229586139).

1201210122021 is a wasteful number, since it uses less digits than its factorization.

1201210122021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3715.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 1201210122021 its reverse (1202210121021), we get a palindrome (2403420243042).

It can be divided in two parts, 1201210 and 122021, that added together give a palindrome (1323231).

The spelling of 1201210122021 in words is "one trillion, two hundred one billion, two hundred ten million, one hundred twenty-two thousand, twenty-one".