1000000202121 has 16 divisors (see below), whose sum is σ = 1483670112000. Its totient is φ = 665682052464.

The previous prime is 1000000202107. The next prime is 1000000202189. The reversal of 1000000202121 is 1212020000001.

It is not a de Polignac number, because 1000000202121 - 2³⁷ = 862561248649 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (1000000201121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27335521 + ... + 27372078.

It is an arithmetic number, because the mean of its divisors is an integer number (92729382000).

Almost surely, 2^{1000000202121} is an apocalyptic number.

It is an amenable number.

1000000202121 is a deficient number, since it is larger than the sum of its proper divisors (483669909879).

1000000202121 is an equidigital number, since it uses as much as digits as its factorization.

1000000202121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54708285 (or 54708279 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 1000000202121 its reverse (1212020000001), we get a palindrome (2212020202122).

The spelling of 1000000202121 in words is "one trillion, two hundred two thousand, one hundred twenty-one".