1020210121 has 16 divisors (see below), whose sum is σ = 1173408768. Its totient is φ = 868896000.

The previous prime is 1020210119. The next prime is 1020210151. The reversal of 1020210121 is 1210120201.

It is not a de Polignac number, because 1020210121 - 2¹ = 1020210119 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1020210098 and 1020210107.

It is not an unprimeable number, because it can be changed into a prime (1020210101) 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, 1181736 + ... + 1182598.

It is an arithmetic number, because the mean of its divisors is an integer number (73338048).

Almost surely, 2^1020210121 is an apocalyptic number.

It is an amenable number.

1020210121 is a deficient number, since it is larger than the sum of its proper divisors (153198647).

1020210121 is an equidigital number, since it uses as much as digits as its factorization.

1020210121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1752.

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

The square root of 1020210121 is about 31940.7282478030. The cubic root of 1020210121 is about 1006.6918265693.

Adding to 1020210121 its reverse (1210120201), we get a palindrome (2230330322).

The spelling of 1020210121 in words is "one billion, twenty million, two hundred ten thousand, one hundred twenty-one".