1012121001021 has 16 divisors (see below), whose sum is σ = 1463910001344. Its totient is φ = 618297385344.

The previous prime is 1012121000887. The next prime is 1012121001053. The reversal of 1012121001021 is 1201001212101.

It is not a de Polignac number, because 1012121001021 - 2¹⁸ = 1012120738877 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1012121000988 and 1012121001006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1012121001061) 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, 94709331 + ... + 94720016.

It is an arithmetic number, because the mean of its divisors is an integer number (91494375084).

Almost surely, 2^{1012121001021} is an apocalyptic number.

It is an amenable number.

1012121001021 is a deficient number, since it is larger than the sum of its proper divisors (451789000323).

1012121001021 is a wasteful number, since it uses less digits than its factorization.

1012121001021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189429500.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 1012121001021 its reverse (1201001212101), we get a palindrome (2213122213122).

The spelling of 1012121001021 in words is "one trillion, twelve billion, one hundred twenty-one million, one thousand, twenty-one".