1201101210021 has 32 divisors (see below), whose sum is σ = 1715541396480. Its totient is φ = 745262380800.

The previous prime is 1201101210019. The next prime is 1201101210041. The reversal of 1201101210021 is 1200121011021.

It is not a de Polignac number, because 1201101210021 - 2¹ = 1201101210019 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1201101209979 and 1201101210006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201101210011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 620941 + ... + 1669661.

It is an arithmetic number, because the mean of its divisors is an integer number (53610668640).

Almost surely, 2^{1201101210021} is an apocalyptic number.

It is an amenable number.

1201101210021 is a deficient number, since it is larger than the sum of its proper divisors (514440186459).

1201101210021 is a wasteful number, since it uses less digits than its factorization.

1201101210021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1049097.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 1201101210021 its reverse (1200121011021), we get a palindrome (2401222221042).

The spelling of 1201101210021 in words is "one trillion, two hundred one billion, one hundred one million, two hundred ten thousand, twenty-one".