1020120000121 has 16 divisors (see below), whose sum is σ = 1047091167360. Its totient is φ = 993552739200.

The previous prime is 1020120000073. The next prime is 1020120000131. The reversal of 1020120000121 is 1210000210201.

It is a cyclic number.

It is not a de Polignac number, because 1020120000121 - 2⁷ = 1020119999993 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1020120000098 and 1020120000107.

It is not an unprimeable number, because it can be changed into a prime (1020120000131) 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, 2611836 + ... + 2976898.

It is an arithmetic number, because the mean of its divisors is an integer number (65443197960).

Almost surely, 2^{1020120000121} is an apocalyptic number.

It is an amenable number.

1020120000121 is a deficient number, since it is larger than the sum of its proper divisors (26971167239).

1020120000121 is a wasteful number, since it uses less digits than its factorization.

1020120000121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 365616.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 1020120000121 its reverse (1210000210201), we get a palindrome (2230120210322).

The spelling of 1020120000121 in words is "one trillion, twenty billion, one hundred twenty million, one hundred twenty-one", and thus it is an aban number.