1012202121 has 16 divisors (see below), whose sum is σ = 1542969728. Its totient is φ = 578188800.

The previous prime is 1012202119. The next prime is 1012202179. The reversal of 1012202121 is 1212022101.

It is not a de Polignac number, because 1012202121 - 2¹ = 1012202119 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1012202097 and 1012202106.

It is not an unprimeable number, because it can be changed into a prime (1012202021) 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, 63411 + ... + 77751.

It is an arithmetic number, because the mean of its divisors is an integer number (96435608).

Almost surely, 2^1012202121 is an apocalyptic number.

It is an amenable number.

1012202121 is a deficient number, since it is larger than the sum of its proper divisors (530767607).

1012202121 is a wasteful number, since it uses less digits than its factorization.

1012202121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17712.

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

The square root of 1012202121 is about 31815.1240921672. The cubic root of 1012202121 is about 1004.0509413818.

Adding to 1012202121 its reverse (1212022101), we get a palindrome (2224224222).

The spelling of 1012202121 in words is "one billion, twelve million, two hundred two thousand, one hundred twenty-one".