1002012020121 has 32 divisors (see below), whose sum is σ = 1584381689856. Its totient is φ = 551206872000.

The previous prime is 1002012020071. The next prime is 1002012020123. The reversal of 1002012020121 is 1210202102001.

It is not a de Polignac number, because 1002012020121 - 2⁶ = 1002012020057 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1002012020097 and 1002012020106.

It is not an unprimeable number, because it can be changed into a prime (1002012020123) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3904950 + ... + 4153631.

It is an arithmetic number, because the mean of its divisors is an integer number (49511927808).

Almost surely, 2^{1002012020121} is an apocalyptic number.

It is an amenable number.

1002012020121 is a deficient number, since it is larger than the sum of its proper divisors (582369669735).

1002012020121 is a wasteful number, since it uses less digits than its factorization.

1002012020121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8058813.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 1002012020121 its reverse (1210202102001), we get a palindrome (2212214122122).

The spelling of 1002012020121 in words is "one trillion, two billion, twelve million, twenty thousand, one hundred twenty-one".