1012202021121 has 16 divisors (see below), whose sum is σ = 1413257358336. Its totient is φ = 643181360976.

The previous prime is 1012202021053. The next prime is 1012202021183. The reversal of 1012202021121 is 1211202022101.

It is not a de Polignac number, because 1012202021121 - 2¹⁰ = 1012202020097 is a prime.

It is a super-2 number, since 2×1012202021121² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1012202021121.

It is not an unprimeable number, because it can be changed into a prime (1012202021021) 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 15 ways as a sum of consecutive naturals, for example, 25898485 + ... + 25937538.

It is an arithmetic number, because the mean of its divisors is an integer number (88328584896).

Almost surely, 2^{1012202021121} is an apocalyptic number.

It is an amenable number.

1012202021121 is a deficient number, since it is larger than the sum of its proper divisors (401055337215).

1012202021121 is a wasteful number, since it uses less digits than its factorization.

1012202021121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51836332.

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

Adding to 1012202021121 its reverse (1211202022101), we get a palindrome (2223404043222).

The spelling of 1012202021121 in words is "one trillion, twelve billion, two hundred two million, twenty-one thousand, one hundred twenty-one".