1210020111021 has 8 divisors (see below), whose sum is σ = 1613366154144. Its totient is φ = 806677070960.

The previous prime is 1210020110993. The next prime is 1210020111029. The reversal of 1210020111021 is 1201110200121.

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-1210020111021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1210020110988 and 1210020111006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1210020111029) 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, 475570 + ... + 1626716.

It is an arithmetic number, because the mean of its divisors is an integer number (201670769268).

Almost surely, 2^{1210020111021} is an apocalyptic number.

It is an amenable number.

1210020111021 is a deficient number, since it is larger than the sum of its proper divisors (403346043123).

1210020111021 is a wasteful number, since it uses less digits than its factorization.

1210020111021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1501531.

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

Adding to 1210020111021 its reverse (1201110200121), we get a palindrome (2411130311142).

The spelling of 1210020111021 in words is "one trillion, two hundred ten billion, twenty million, one hundred eleven thousand, twenty-one".