1021210121199 has 16 divisors (see below), whose sum is σ = 1375384026240. Its totient is φ = 673924317600.

The previous prime is 1021210121123. The next prime is 1021210121209. The reversal of 1021210121199 is 9911210121201.

It is not a de Polignac number, because 1021210121199 - 2⁹ = 1021210120687 is a prime.

It is a super-2 number, since 2×1021210121199² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021210122199) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1098432 + ... + 1802490.

It is an arithmetic number, because the mean of its divisors is an integer number (85961501640).

Almost surely, 2^{1021210121199} is an apocalyptic number.

1021210121199 is a deficient number, since it is larger than the sum of its proper divisors (354173905041).

1021210121199 is a wasteful number, since it uses less digits than its factorization.

1021210121199 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 708950.

The product of its (nonzero) digits is 648, while the sum is 30.

The spelling of 1021210121199 in words is "one trillion, twenty-one billion, two hundred ten million, one hundred twenty-one thousand, one hundred ninety-nine".