1210021121989 has 8 divisors (see below), whose sum is σ = 1255954918400. Its totient is φ = 1164518629200.

The previous prime is 1210021121957. The next prime is 1210021122017. The reversal of 1210021121989 is 9891211200121.

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

It is a cyclic number.

It is not a de Polignac number, because 1210021121989 - 2⁵ = 1210021121957 is a prime.

It is a super-2 number, since 2×1210021121989² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1210021124989) 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, 107820189 + ... + 107831410.

It is an arithmetic number, because the mean of its divisors is an integer number (156994364800).

Almost surely, 2^{1210021121989} is an apocalyptic number.

It is an amenable number.

1210021121989 is a deficient number, since it is larger than the sum of its proper divisors (45933796411).

1210021121989 is a wasteful number, since it uses less digits than its factorization.

1210021121989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215651811.

The product of its (nonzero) digits is 5184, while the sum is 37.

The spelling of 1210021121989 in words is "one trillion, two hundred ten billion, twenty-one million, one hundred twenty-one thousand, nine hundred eighty-nine".